Tag 3.8.6.

Built from https://develop.svn.wordpress.org/@32253 git-svn-id: http://core.svn.wordpress.org/tags/3.8.6@32224 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2015-04-21 16:12:12 +00:00
48 changed files with 3897 additions and 6353 deletions
--- a/license.txt
+++ b/license.txt
@@ -1,6 +1,6 @@
 WordPress - Web publishing software

-Copyright 2017 by the contributors
+Copyright 2015 by the contributors

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
--- a/readme.html
+++ b/readme.html
@@ -9,7 +9,7 @@
 <body>
 <h1 id="logo">
 	<a href="http://wordpress.org/"><img alt="WordPress" src="wp-admin/images/wordpress-logo.png" /></a>
-	<br /> Version 3.8.17
+	<br /> Version 3.8.6
 </h1>
 <p style="text-align: center">Semantic Personal Publishing Platform</p>

--- a/wp-admin/about.php
+++ b/wp-admin/about.php
@@ -39,74 +39,30 @@ include( ABSPATH . 'wp-admin/admin-header.php' );
 </h2>

 <div class="changelog point-releases">
-	<h3><?php echo _n( 'Maintenance and Security Release', 'Maintenance and Security Releases', 17 ); ?></h3>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 8 ), '3.8.17' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.17' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 2 ), '3.8.16' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.16' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 9 ), '3.8.15' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.15' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 6 ), '3.8.14' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.14' ); ?>
- 	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 2 ), '3.8.13' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.13' ); ?>
- 	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 1 ), '3.8.12' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.12' ); ?>
- 	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
-         '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.', 2 ), '3.8.11', number_format_i18n( 2 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.11' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
-         '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.', 2 ), '3.8.10', number_format_i18n( 2 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.10' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
-         '<strong>Version %1$s</strong> addressed some security issues.', 2 ), '3.8.9' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.9' ); ?>
- 	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
-         '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.', 3 ), '3.8.8', number_format_i18n( 3 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.8' ); ?>
-	</p>
-	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
-         '<strong>Version %1$s</strong> addressed %2$s bugs.', 1 ), '3.8.7', number_format_i18n( 1 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.7' ); ?>
- 	</p>
+	<h3><?php echo _n( 'Maintenance and Security Release', 'Maintenance and Security Releases', 6 ); ?></h3>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
         '<strong>Version %1$s</strong> addressed some security issues.', 8 ), '3.8.6' ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.6' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.6' ); ?>
 	</p>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
         '<strong>Version %1$s</strong> addressed some security issues.', 8 ), '3.8.5', number_format_i18n( 8 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.5' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.5' ); ?>
 	</p>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed a security issue.',
         '<strong>Version %1$s</strong> addressed some security issues.', 5 ), '3.8.4', number_format_i18n( 5 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.4' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.4' ); ?>
 	</p>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
 		'<strong>Version %1$s</strong> addressed %2$s bugs.', 2 ), '3.8.3', number_format_i18n( 2 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.3' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.3' ); ?>
 	</p>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bug.',
         '<strong>Version %1$s</strong> addressed some security issues and fixed %2$s bugs.', 9 ), '3.8.2', number_format_i18n( 9 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.2' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.2' ); ?>
 	</p>
 	<p><?php printf( _n( '<strong>Version %1$s</strong> addressed %2$s bug.',
 		'<strong>Version %1$s</strong> addressed %2$s bugs.', 31 ), '3.8.1', number_format_i18n( 31 ) ); ?>
-		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'https://codex.wordpress.org/Version_3.8.1' ); ?>
+		<?php printf( __( 'For more information, see <a href="%s">the release notes</a>.' ), 'http://codex.wordpress.org/Version_3.8.1' ); ?>
 	</p>
 </div>

--- a/wp-admin/customize.php
+++ b/wp-admin/customize.php
@@ -15,10 +15,9 @@ if ( ! current_user_can( 'edit_theme_options' ) )

 wp_reset_vars( array( 'url', 'return' ) );
 $url = urldecode( $url );
-$url = esc_url_raw( $url );
 $url = wp_validate_redirect( $url, home_url( '/' ) );
 if ( $return )
-	$return = wp_validate_redirect( esc_url_raw( urldecode( $return ) ) );
+	$return = wp_validate_redirect( urldecode( $return ) );
 if ( ! $return )
 	$return = $url;

--- a/wp-admin/includes/ajax-actions.php
+++ b/wp-admin/includes/ajax-actions.php
@@ -1373,13 +1373,11 @@ function wp_ajax_inline_save() {
 	if ( isset($data['post_parent']) )
 		$data['parent_id'] = $data['post_parent'];

-	// Status.
-	if ( isset( $data['keep_private'] ) && 'private' == $data['keep_private'] ) {
-		$data['visibility']  = 'private';
+	// status
+	if ( isset($data['keep_private']) && 'private' == $data['keep_private'] )
 		$data['post_status'] = 'private';
-	} else {
+	else
 		$data['post_status'] = $data['_status'];
-	}

 	if ( empty($data['comment_status']) )
 		$data['comment_status'] = 'closed';
@@ -2222,7 +2220,7 @@ function wp_ajax_get_revision_diffs() {
 	if ( ! $post = get_post( (int) $_REQUEST['post_id'] ) )
 		wp_send_json_error();

-	if ( ! current_user_can( 'edit_post', $post->ID ) )
+	if ( ! current_user_can( 'read_post', $post->ID ) )
 		wp_send_json_error();

 	// Really just pre-loading the cache here.
--- a/wp-admin/includes/class-wp-ms-users-list-table.php
+++ b/wp-admin/includes/class-wp-ms-users-list-table.php
@@ -219,7 +219,7 @@ class WP_MS_Users_List_Table extends WP_List_Table {
 					break;

 					case 'email':
-						echo "<td $attributes><a href='" . esc_url( "mailto:$user->user_email" ) . "'>$user->user_email</a></td>";
+						echo "<td $attributes><a href='mailto:$user->user_email'>$user->user_email</a></td>";
 					break;

 					case 'registered':
--- a/wp-admin/includes/class-wp-upgrader.php
+++ b/wp-admin/includes/class-wp-upgrader.php
@@ -1601,12 +1601,8 @@ class File_Upload_Upgrader {
 			if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
 				wp_die( $uploads['error'] );

-			$this->filename = sanitize_file_name( $_GET[ $urlholder ] );
+			$this->filename = $_GET[$urlholder];
 			$this->package = $uploads['basedir'] . '/' . $this->filename;
-
-			if ( 0 !== strpos( realpath( $this->package ), realpath( $uploads['basedir'] ) ) ) {
-				wp_die( __( 'Please select a file' ) );
-			}
 		}
 	}

--- a/wp-admin/includes/class-wp-users-list-table.php
+++ b/wp-admin/includes/class-wp-users-list-table.php
@@ -294,7 +294,7 @@ class WP_Users_List_Table extends WP_List_Table {
 					$r .= "<td $attributes>$user_object->first_name $user_object->last_name</td>";
 					break;
 				case 'email':
-					$r .= "<td $attributes><a href='" . esc_url( "mailto:$email" ) . "' title='" . esc_attr( sprintf( __( 'E-mail: %s' ), $email ) ) . "'>$email</a></td>";
+					$r .= "<td $attributes><a href='mailto:$email' title='" . esc_attr( sprintf( __( 'E-mail: %s' ), $email ) ) . "'>$email</a></td>";
 					break;
 				case 'role':
 					$r .= "<td $attributes>$role_name</td>";
--- a/wp-admin/includes/dashboard.php
+++ b/wp-admin/includes/dashboard.php
@@ -333,10 +333,6 @@ function wp_network_dashboard_right_now() {
 function wp_dashboard_quick_press( $error_msg = false ) {
 	global $post_ID;

-	if ( ! current_user_can( 'edit_posts' ) ) {
-		return;
-	}
-
 	/* Check if a new auto-draft (= no new post_ID) is needed or if the old can be used */
 	$last_post_id = (int) get_user_option( 'dashboard_quick_press_last_post_id' ); // Get the last post_ID
 	if ( $last_post_id ) {
--- a/wp-admin/includes/media.php
+++ b/wp-admin/includes/media.php
@@ -221,7 +221,7 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 	$url = $file['url'];
 	$type = $file['type'];
 	$file = $file['file'];
-	$title = sanitize_text_field( $name );
+	$title = $name;
 	$content = '';

 	if ( preg_match( '#^audio#', $type ) ) {
@@ -1558,7 +1558,7 @@ $post_params = array(
 $post_params = apply_filters( 'upload_post_params', $post_params ); // hook change! old name: 'swfupload_post_params'

 $plupload_init = array(
-	'runtimes' => 'html5,silverlight,html4',
+	'runtimes' => 'html5,silverlight,flash,html4',
 	'browse_button' => 'plupload-browse-button',
 	'container' => 'plupload-upload-ui',
 	'drop_element' => 'drag-drop-area',
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -154,13 +154,6 @@ function _wp_translate_postdata( $update = false, $post_data = null ) {
 		$post_data['post_date_gmt'] = get_gmt_from_date( $post_data['post_date'] );
 	}

-	if ( isset( $post_data['post_category'] ) ) {
-		$category_object = get_taxonomy( 'category' );
-		if ( ! current_user_can( $category_object->cap->assign_terms ) ) {
-			unset( $post_data['post_category'] );
-		}
-	}
-
 	return $post_data;
 }

@@ -1154,11 +1147,11 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 	}

 	if ( false === strpos($permalink, '%postname%') && false === strpos($permalink, '%pagename%') ) {
-		$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink" tabindex="-1">' . esc_html( $permalink ) . "</span>\n";
+		$return = '<strong>' . __('Permalink:') . "</strong>\n" . '<span id="sample-permalink" tabindex="-1">' . $permalink . "</span>\n";
 		if ( '' == get_option( 'permalink_structure' ) && current_user_can( 'manage_options' ) && !( 'page' == get_option('show_on_front') && $id == get_option('page_on_front') ) )
 			$return .= '<span id="change-permalinks"><a href="options-permalink.php" class="button button-small" target="_blank">' . __('Change Permalinks') . "</a></span>\n";
 		if ( isset( $view_post ) )
-			$return .= "<span id='view-post-btn'><a href='" . esc_url( $permalink ) . "' class='button button-small'>$view_post</a></span>\n";
+			$return .= "<span id='view-post-btn'><a href='$permalink' class='button button-small'>$view_post</a></span>\n";

 		$return = apply_filters('get_sample_permalink_html', $return, $id, $new_title, $new_slug);

@@ -1179,16 +1172,16 @@ function get_sample_permalink_html( $id, $new_title = null, $new_slug = null ) {
 		}
 	}

-	$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . esc_html( $post_name_abridged ) . '</span>';
-	$display_link = str_replace(array('%pagename%','%postname%'), $post_name_html, esc_html( $permalink ) );
+	$post_name_html = '<span id="editable-post-name" title="' . $title . '">' . $post_name_abridged . '</span>';
+	$display_link = str_replace(array('%pagename%','%postname%'), $post_name_html, $permalink);
 	$view_link = str_replace(array('%pagename%','%postname%'), $post_name, $permalink);
 	$return =  '<strong>' . __('Permalink:') . "</strong>\n";
 	$return .= '<span id="sample-permalink" tabindex="-1">' . $display_link . "</span>\n";
 	$return .= '&lrm;'; // Fix bi-directional text display defect in RTL languages.
 	$return .= '<span id="edit-slug-buttons"><a href="#post_name" class="edit-slug button button-small hide-if-no-js" onclick="editPermalink(' . $id . '); return false;">' . __('Edit') . "</a></span>\n";
-	$return .= '<span id="editable-post-name-full">' . esc_html( $post_name ) . "</span>\n";
+	$return .= '<span id="editable-post-name-full">' . $post_name . "</span>\n";
 	if ( isset($view_post) )
-		$return .= "<span id='view-post-btn'><a href='" . esc_url( $view_link ) . "' class='button button-small'>$view_post</a></span>\n";
+		$return .= "<span id='view-post-btn'><a href='$view_link' class='button button-small'>$view_post</a></span>\n";

 	$return = apply_filters('get_sample_permalink_html', $return, $id, $new_title, $new_slug);

@@ -1361,7 +1354,7 @@ function _admin_notice_post_locked() {
 		// Allow plugins to prevent some users overriding the post lock
 		if ( $override ) {
 			?>
-			<a class="button button-primary wp-tab-last" href="<?php echo esc_url( add_query_arg( 'get-post-lock', '1', wp_nonce_url( get_edit_post_link( $post->ID, 'url' ), 'lock-post_' . $post->ID ) ) ); ?>"><?php _e('Take over'); ?></a>
+			<a class="button button-primary wp-tab-last" href="<?php echo esc_url( add_query_arg( 'get-post-lock', '1', get_edit_post_link( $post->ID, 'url' ) ) ); ?>"><?php _e('Take over'); ?></a>
 			<?php
 		}

--- a/wp-admin/includes/screen.php
+++ b/wp-admin/includes/screen.php
@@ -885,8 +885,7 @@ final class WP_Screen {

 		switch ( $this->id ) {
 			case 'widgets':
-				$nonce = wp_create_nonce( 'widgets-access' );
-				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on&_wpnonce=' . urlencode( $nonce ) . '">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off&_wpnonce=' . urlencode( $nonce ) . '">' . __('Disable accessibility mode') . "</a></p>\n";
+				$this->_screen_settings = '<p><a id="access-on" href="widgets.php?widgets-access=on">' . __('Enable accessibility mode') . '</a><a id="access-off" href="widgets.php?widgets-access=off">' . __('Disable accessibility mode') . "</a></p>\n";
 				break;
 			default:
 				$this->_screen_settings = '';
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -923,9 +923,6 @@ function update_core($from, $to) {
 		$wp_filesystem->delete($old_file, true);
 	}

-	// Remove any Genericons example.html's from the filesystem
-	_upgrade_422_remove_genericons();
-
 	// Upgrade DB with separate request
 	apply_filters('update_feedback', __('Upgrading database&#8230;'));
 	$db_upgrade_url = admin_url('upgrade.php?step=upgrade_db');
@@ -1054,67 +1051,3 @@ window.location = 'about.php?updated';
 	exit();
 }
 add_action( '_core_updated_successfully', '_redirect_to_about_wordpress' );
-
-/**
- * Cleans up Genericons example files.
- *
- * @since 4.2.2
- */
-function _upgrade_422_remove_genericons() {
-	global $wp_theme_directories, $wp_filesystem;
-
-	// A list of the affected files using the filesystem absolute paths.
-	$affected_files = array();
-
-	// Themes
-	foreach ( $wp_theme_directories as $directory ) {
-		$affected_theme_files = _upgrade_422_find_genericons_files_in_folder( $directory );
-		$affected_files       = array_merge( $affected_files, $affected_theme_files );
-	}
-
-	// Plugins
-	$affected_plugin_files = _upgrade_422_find_genericons_files_in_folder( WP_PLUGIN_DIR );
-	$affected_files        = array_merge( $affected_files, $affected_plugin_files );
-
-	foreach ( $affected_files as $file ) {
-		$gen_dir = $wp_filesystem->find_folder( trailingslashit( dirname( $file ) ) );
-		if ( empty( $gen_dir ) ) {
-			continue;
-		}
-
-		// The path when the file is accessed via WP_Filesystem may differ in the case of FTP
-		$remote_file = $gen_dir . basename( $file );
-
-		if ( ! $wp_filesystem->exists( $remote_file ) ) {
-			continue;
-		}
-
-		if ( ! $wp_filesystem->delete( $remote_file, false, 'f' ) ) {
-			$wp_filesystem->put_contents( $remote_file, '' );
-		}
-	}
-}
-
-/**
- * Recursively find Genericons example files in a given folder.
- *
- * @ignore
- * @since 4.2.2
- *
- * @param string $directory Directory path. Expects trailingslashed.
- * @return array
- */
-function _upgrade_422_find_genericons_files_in_folder( $directory ) {
-	$directory = trailingslashit( $directory );
-	$files     = array();
-
-	if ( file_exists( "{$directory}example.html" ) && false !== strpos( file_get_contents( "{$directory}example.html" ), '<title>Genericons</title>' ) ) {
-		$files[] = "{$directory}example.html";
-	}
-
-	foreach ( glob( $directory . '*', GLOB_ONLYDIR ) as $dir ) {
-		$files = array_merge( $files, _upgrade_422_find_genericons_files_in_folder( $dir ) );
-	}
-
-	return $files;
-}
--- a/wp-admin/includes/upgrade.php
+++ b/wp-admin/includes/upgrade.php
@@ -414,9 +414,6 @@ function upgrade_all() {
 	if ( $wp_current_db_version < 26692 )
 		upgrade_383();

-	if ( $wp_current_db_version < 26694 )
-		upgrade_389();
-
 	maybe_disable_link_manager();

 	maybe_disable_automattic_widgets();
@@ -1287,62 +1284,6 @@ function upgrade_383() {
 	}
 }

-/**
- * Execute changes made in WordPress 3.8.8.
- *
- * @since 3.8.8
- */
-function upgrade_388() {
-}
-
-/**
- * Execute changes made in WordPress 3.8.9.
- *
- * @since 3.8.9
- */
-function upgrade_389() {
-	global $wp_current_db_version, $wpdb;
-
-	if ( $wp_current_db_version < 26694 ) {
-		$content_length = $wpdb->get_col_length( $wpdb->comments, 'comment_content' );
-
-		if ( is_wp_error( $content_length ) ) {
-			return;
-		}
-
-		if ( false === $content_length ) {
-			$content_length = array(
-				'type'   => 'byte',
-				'length' => 65535,
-			);
-		} elseif ( ! is_array( $content_length ) ) {
-			$length = (int) $content_length > 0 ? (int) $content_length : 65535;
-			$content_length = array(
-				'type'	 => 'byte',
-				'length' => $length
-			);
-		}
-
-		if ( 'byte' !== $content_length['type'] || 0 === $content_length['length'] ) {
-			// Sites with malformed DB schemas are on their own.
-			return;
-		}
-
-		$allowed_length = intval( $content_length['length'] ) - 10;
-
-		$comments = $wpdb->get_results(
-			"SELECT `comment_ID` FROM `{$wpdb->comments}`
-				WHERE `comment_date_gmt` > '2015-04-26'
-				AND LENGTH( `comment_content` ) >= {$allowed_length}
-				AND ( `comment_content` LIKE '%<%' OR `comment_content` LIKE '%>%' )"
-		);
-
-		foreach ( $comments as $comment ) {
-			wp_delete_comment( $comment->comment_ID, true );
-		}
-	}
-}
-
 /**
 * Execute network level changes
 *
--- a/wp-admin/network/settings.php
+++ b/wp-admin/network/settings.php
@@ -237,7 +237,7 @@ if ( isset( $_GET['updated'] ) ) {
 			<tr valign="top">
 				<th scope="row"><label for="first_comment_author"><?php _e( 'First Comment Author' ) ?></label></th>
 				<td>
-					<input type="text" size="40" name="first_comment_author" id="first_comment_author" value="<?php echo esc_attr( get_site_option('first_comment_author') ); ?>" />
+					<input type="text" size="40" name="first_comment_author" id="first_comment_author" value="<?php echo get_site_option('first_comment_author') ?>" />
 					<p class="description">
 						<?php _e( 'The author of the first comment on a new site.' ) ?>
 					</p>
--- a/wp-admin/post.php
+++ b/wp-admin/post.php
@@ -109,9 +109,8 @@ case 'post-quickdraft-save':
 	if ( ! wp_verify_nonce( $nonce, 'add-post' ) )
 		$error_msg = __( 'Unable to submit this form, please refresh and try again.' );

-	if ( ! current_user_can( 'edit_posts' ) ) {
-		exit;
-	}
+	if ( ! current_user_can( 'edit_posts' ) )
+		$error_msg = __( 'Oops, you don&#8217;t have access to add new drafts.' );

 	if ( $error_msg )
 		return wp_dashboard_quick_press( $error_msg );
@@ -158,7 +157,6 @@ case 'edit':
 		wp_die( __( 'You can&#8217;t edit this item because it is in the Trash. Please restore it and try again.' ) );

 	if ( ! empty( $_GET['get-post-lock'] ) ) {
-		check_admin_referer( 'lock-post_' . $post_id );
 		wp_set_post_lock( $post_id );
 		wp_redirect( get_edit_post_link( $post_id, 'url' ) );
 		exit();
--- a/wp-admin/revision.php
+++ b/wp-admin/revision.php
@@ -63,7 +63,7 @@ default :
 	if ( ! $post = get_post( $revision->post_parent ) )
 		break;

-	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'edit_post', $revision->post_parent ) )
+	if ( ! current_user_can( 'read_post', $revision->ID ) || ! current_user_can( 'read_post', $post->ID ) )
 		break;

 	// Revisions disabled and we're not looking at an autosave
--- a/wp-admin/update-core.php
+++ b/wp-admin/update-core.php
@@ -237,8 +237,6 @@ function list_plugin_updates() {
 	<tbody class="plugins">
 <?php
 	foreach ( (array) $plugins as $plugin_file => $plugin_data) {
-		$plugin_data = (object) _get_plugin_data_markup_translate( $plugin_file, (array) $plugin_data, false, true );
-
 		$info = plugins_api('plugin_information', array('slug' => $plugin_data->update->slug ));
 		// Get plugin compat for running version of WordPress.
 		if ( isset($info->tested) && version_compare($info->tested, $cur_wp_version, '>=') ) {
--- a/wp-admin/user-edit.php
+++ b/wp-admin/user-edit.php
@@ -98,7 +98,7 @@ if ( is_multisite()
 // Execute confirmed email change. See send_confirmation_on_profile_email().
 if ( is_multisite() && IS_PROFILE_PAGE && isset( $_GET[ 'newuseremail' ] ) && $current_user->ID ) {
 	$new_email = get_option( $current_user->ID . '_new_email' );
-	if ( $new_email && hash_equals( $new_email[ 'hash' ], $_GET[ 'newuseremail' ] ) ) {
+	if ( $new_email[ 'hash' ] == $_GET[ 'newuseremail' ] ) {
 		$user = new stdClass;
 		$user->ID = $current_user->ID;
 		$user->user_email = esc_html( trim( $new_email[ 'newemail' ] ) );
@@ -109,8 +109,7 @@ if ( is_multisite() && IS_PROFILE_PAGE && isset( $_GET[ 'newuseremail' ] ) && $c
 		wp_redirect( add_query_arg( array('updated' => 'true'), self_admin_url( 'profile.php' ) ) );
 		die();
 	}
-} elseif ( is_multisite() && IS_PROFILE_PAGE && !empty( $_GET['dismiss'] ) && $current_user->ID . '_new_email' === $_GET['dismiss'] ) {
-	check_admin_referer( 'dismiss-' . $current_user->ID . '_new_email' );
+} elseif ( is_multisite() && IS_PROFILE_PAGE && !empty( $_GET['dismiss'] ) && $current_user->ID . '_new_email' == $_GET['dismiss'] ) {
 	delete_option( $current_user->ID . '_new_email' );
 	wp_redirect( add_query_arg( array('updated' => 'true'), self_admin_url( 'profile.php' ) ) );
 	die();
@@ -407,7 +406,7 @@ if ( is_multisite() && is_network_admin() && ! IS_PROFILE_PAGE && current_user_c
 	$new_email = get_option( $current_user->ID . '_new_email' );
 	if ( $new_email && $new_email['newemail'] != $current_user->user_email && $profileuser->ID == $current_user->ID ) : ?>
 	<div class="updated inline">
-	<p><?php printf( __('There is a pending change of your e-mail to <code>%1$s</code>. <a href="%2$s">Cancel</a>'), esc_html( $new_email['newemail'] ), esc_url( wp_nonce_url( self_admin_url( 'profile.php?dismiss=' . $current_user->ID . '_new_email' ), 'dismiss-' . $current_user->ID . '_new_email' ) ) ); ?></p>
+	<p><?php printf( __('There is a pending change of your e-mail to <code>%1$s</code>. <a href="%2$s">Cancel</a>'), $new_email['newemail'], esc_url( self_admin_url( 'profile.php?dismiss=' . $current_user->ID . '_new_email' ) ) ); ?></p>
 	</div>
 	<?php endif; ?>
 	</td>
--- a/wp-admin/widgets.php
+++ b/wp-admin/widgets.php
@@ -17,8 +17,6 @@ if ( ! current_user_can('edit_theme_options') )

 $widgets_access = get_user_setting( 'widgets_access' );
 if ( isset($_GET['widgets-access']) ) {
-	check_admin_referer( 'widgets-access' );
-
 	$widgets_access = 'on' == $_GET['widgets-access'] ? 'on' : 'off';
 	set_user_setting( 'widgets_access', $widgets_access );
 }
--- a/wp-includes/capabilities.php
+++ b/wp-includes/capabilities.php
@@ -1104,10 +1104,8 @@ function map_meta_cap( $cap, $user_id ) {
 	case 'edit_post':
 	case 'edit_page':
 		$post = get_post( $args[0] );
-		if ( empty( $post ) ) {
-			$caps[] = 'do_not_allow';
+		if ( empty( $post ) )
 			break;
-		}

 		if ( 'revision' == $post->post_type ) {
 			$post = get_post( $post->post_parent );
@@ -1230,16 +1228,7 @@ function map_meta_cap( $cap, $user_id ) {
 		if ( empty( $comment ) )
 			break;
 		$post = get_post( $comment->comment_post_ID );
-
-		/*
-		 * If the post doesn't exist, we have an orphaned comment.
-		 * Fall back to the edit_posts capability, instead.
-		 */
-		if ( $post ) {
-			$caps = map_meta_cap( 'edit_post', $user_id, $post->ID );
-		} else {
-			$caps = map_meta_cap( 'edit_posts', $user_id );
-		}
+		$caps = map_meta_cap( 'edit_post', $user_id, $post->ID );
 		break;
 	case 'unfiltered_upload':
 		if ( defined('ALLOW_UNFILTERED_UPLOADS') && ALLOW_UNFILTERED_UPLOADS && ( !is_multisite() || is_super_admin( $user_id ) )  )
--- a/wp-includes/class-phpmailer.php
+++ b/wp-includes/class-phpmailer.php
--- a/wp-includes/class-smtp.php
+++ b/wp-includes/class-smtp.php
--- a/wp-includes/class-snoopy.php
+++ b/wp-includes/class-snoopy.php
@@ -999,23 +999,20 @@ class Snoopy
 		if(!empty($this->user) || !empty($this->pass))
 			$headers[] = "Authorization: BASIC ".base64_encode($this->user.":".$this->pass);

-		$headerfile = tempnam( $this->temp_dir, "sno" );
-		$cmdline_params = '-k -D ' . escapeshellarg( $headerfile );
-
-		foreach ( $headers as $header ) {
-			$cmdline_params .= ' -H ' . escapeshellarg( $header );
+		for($curr_header = 0; $curr_header < count($headers); $curr_header++) {
+			$safer_header = strtr( $headers[$curr_header], "\"", " " );
+			$cmdline_params .= " -H \"".$safer_header."\"";
 		}

-		if ( ! empty( $body ) ) {
-			$cmdline_params .= ' -d ' . escapeshellarg( $body );
-		}
+		if(!empty($body))
+			$cmdline_params .= " -d \"$body\"";

-		if ( $this->read_timeout > 0 ) {
-			$cmdline_params .= ' -m ' . escapeshellarg( $this->read_timeout );
-		}
+		if($this->read_timeout > 0)
+			$cmdline_params .= " -m ".$this->read_timeout;

+		$headerfile = tempnam($this->temp_dir, "sno");

-		exec( $this->curl_path . ' ' . $cmdline_params . ' ' . escapeshellarg( $URI ), $results, $return );
+		exec($this->curl_path." -k -D \"$headerfile\"".$cmdline_params." \"".escapeshellcmd($URI)."\"",$results,$return);

 		if($return)
 		{
--- a/wp-includes/class-wp-embed.php
+++ b/wp-includes/class-wp-embed.php
@@ -57,7 +57,7 @@ class WP_Embed {
 		add_shortcode( 'embed', array( $this, 'shortcode' ) );

 		// Do the shortcode (only the [embed] one is registered)
-		$content = do_shortcode( $content, true );
+		$content = do_shortcode( $content );

 		// Put the original shortcodes back
 		$shortcode_tags = $orig_shortcode_tags;
@@ -280,14 +280,7 @@ class WP_Embed {
 	 * @return string Potentially modified $content.
 	 */
 	function autoembed( $content ) {
-		// Replace line breaks from all HTML elements with placeholders.
-		$content = wp_replace_in_html_tags( $content, array( "\n" => '<!-- wp-line-break -->' ) );
-
-		// Find URLs that are on their own line.
-		$content = preg_replace_callback( '|^\s*(https?://[^\s"]+)\s*$|im', array( $this, 'autoembed_callback' ), $content );
-
-		// Put the line breaks back.
-		return str_replace( '<!-- wp-line-break -->', "\n", $content );
+		return preg_replace_callback( '|^\s*(https?://[^\s"]+)\s*$|im', array( $this, 'autoembed_callback' ), $content );
 	}

 	/**
--- a/wp-includes/class-wp-theme.php
+++ b/wp-includes/class-wp-theme.php
@@ -215,7 +215,7 @@ final class WP_Theme implements ArrayAccess {
 		} elseif ( ! file_exists( $this->theme_root . '/' . $theme_file ) ) {
 			$this->headers['Name'] = $this->stylesheet;
 			if ( ! file_exists( $this->theme_root . '/' . $this->stylesheet ) )
-				$this->errors = new WP_Error( 'theme_not_found', sprintf( __( 'The theme directory "%s" does not exist.' ), esc_html( $this->stylesheet ) ) );
+				$this->errors = new WP_Error( 'theme_not_found', sprintf( __( 'The theme directory "%s" does not exist.' ), $this->stylesheet ) );
 			else
 				$this->errors = new WP_Error( 'theme_no_stylesheet', __( 'Stylesheet is missing.' ) );
 			$this->template = $this->stylesheet;
@@ -262,7 +262,7 @@ final class WP_Theme implements ArrayAccess {
 				$theme_root_template = $directories[ $this->template ]['theme_root'];
 			} else {
 				// Parent theme is missing.
-				$this->errors = new WP_Error( 'theme_no_parent', sprintf( __( 'The parent theme is missing. Please install the "%s" parent theme.' ), esc_html( $this->template ) ) );
+				$this->errors = new WP_Error( 'theme_no_parent', sprintf( __( 'The parent theme is missing. Please install the "%s" parent theme.' ), $this->template ) );
 				$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
 				$this->parent = new WP_Theme( $this->template, $this->theme_root, $this );
 				return;
@@ -274,11 +274,11 @@ final class WP_Theme implements ArrayAccess {
 			// If we are a parent, then there is a problem. Only two generations allowed! Cancel things out.
 			if ( is_a( $_child, 'WP_Theme' ) && $_child->template == $this->stylesheet ) {
 				$_child->parent = null;
-				$_child->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), esc_html( $_child->template ) ) );
+				$_child->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), $_child->template ) );
 				$_child->cache_add( 'theme', array( 'headers' => $_child->headers, 'errors' => $_child->errors, 'stylesheet' => $_child->stylesheet, 'template' => $_child->template ) );
 				// The two themes actually reference each other with the Template header.
 				if ( $_child->stylesheet == $this->template ) {
-					$this->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), esc_html( $this->template ) ) );
+					$this->errors = new WP_Error( 'theme_parent_invalid', sprintf( __( 'The "%s" theme is not a valid parent theme.' ), $this->template ) );
 					$this->cache_add( 'theme', array( 'headers' => $this->headers, 'errors' => $this->errors, 'stylesheet' => $this->stylesheet, 'template' => $this->template ) );
 				}
 				return;
@@ -650,9 +650,8 @@ final class WP_Theme implements ArrayAccess {
 	private function markup_header( $header, $value, $translate ) {
 		switch ( $header ) {
 			case 'Name' :
-				if ( empty( $value ) ) {
-					$value = esc_html( $this->get_stylesheet() );
-				}
+				if ( empty( $value ) )
+					$value = $this->get_stylesheet();
 				break;
 			case 'Description' :
 				$value = wptexturize( $value );
--- a/wp-includes/class-wp-xmlrpc-server.php
+++ b/wp-includes/class-wp-xmlrpc-server.php
@@ -989,56 +989,6 @@ class wp_xmlrpc_server extends IXR_Server {
 		return $count > 1;
 	}

-	private function _validate_boolean( $var ) {
-		if ( is_bool( $var ) ) {
-			return $var;
-		}
-
-		if ( is_string( $var ) && 'false' === strtolower( $var ) ) {
-			return false;
-		}
-
-		return (bool) $var;
-	}
-
-	/**
-	 * Encapsulate the logic for sticking a post
-	 * and determining if the user has permission to do so
-	 *
-	 * @since 4.3.0
-	 * @access private
-	 *
-	 * @param array $post_data
-	 * @param bool  $update
-	 * @return void|IXR_Error
-	 */
-	private function _toggle_sticky( $post_data, $update = false ) {
-		$post_type = get_post_type_object( $post_data['post_type'] );
-
-		// Private and password-protected posts cannot be stickied.
-		if ( 'private' === $post_data['post_status'] || ! empty( $post_data['post_password'] ) ) {
-			// Error if the client tried to stick the post, otherwise, silently unstick.
-			if ( ! empty( $post_data['sticky'] ) ) {
-				return new IXR_Error( 401, __( 'Sorry, you cannot stick a private post.' ) );
-			}
-
-			if ( $update ) {
-				unstick_post( $post_data['ID'] );
-			}
-		} elseif ( isset( $post_data['sticky'] ) )  {
-			if ( ! current_user_can( $post_type->cap->edit_others_posts ) ) {
-				return new IXR_Error( 401, __( 'Sorry, you are not allowed to stick this post.' ) );
-			}
-
-			$sticky = $this->_validate_boolean( $post_data['sticky'] );
-			if ( $sticky ) {
-				stick_post( $post_data['ID'] );
-			} else {
-				unstick_post( $post_data['ID'] );
-			}
-		}
-	}
-
 	/**
 	 * Helper method for wp_newPost and wp_editPost, containing shared logic.
 	 *
@@ -1131,9 +1081,20 @@ class wp_xmlrpc_server extends IXR_Server {
 		$post_ID = $post_data['ID'];

 		if ( $post_data['post_type'] == 'post' ) {
-			$error = $this->_toggle_sticky( $post_data, $update );
-			if ( $error ) {
-				return $error;
+			// Private and password-protected posts cannot be stickied.
+			if ( $post_data['post_status'] == 'private' || ! empty( $post_data['post_password'] ) ) {
+				// Error if the client tried to stick the post, otherwise, silently unstick.
+				if ( ! empty( $post_data['sticky'] ) )
+					return new IXR_Error( 401, __( 'Sorry, you cannot stick a private post.' ) );
+				if ( $update )
+					unstick_post( $post_ID );
+			} elseif ( isset( $post_data['sticky'] ) )  {
+				if ( ! current_user_can( $post_type->cap->edit_others_posts ) )
+					return new IXR_Error( 401, __( 'Sorry, you are not allowed to stick this post.' ) );
+				if ( $post_data['sticky'] )
+					stick_post( $post_ID );
+				else
+					unstick_post( $post_ID );
 			}
 		}

@@ -4310,12 +4271,10 @@ class wp_xmlrpc_server extends IXR_Server {

 		// Only posts can be sticky
 		if ( $post_type == 'post' && isset( $content_struct['sticky'] ) ) {
-			$data = $postdata;
-			$data['sticky'] = $content_struct['sticky'];
-			$error = $this->_toggle_sticky( $data );
-			if ( $error ) {
-				return $error;
-			}
+			if ( $content_struct['sticky'] == true )
+				stick_post( $post_ID );
+			elseif ( $content_struct['sticky'] == false )
+				unstick_post( $post_ID );
 		}

 		if ( isset($content_struct['custom_fields']) )
@@ -4579,12 +4538,11 @@ class wp_xmlrpc_server extends IXR_Server {

 		$tags_input = isset( $content_struct['mt_keywords'] ) ? $content_struct['mt_keywords'] : null;

-		if ( 'publish' == $post_status || 'private' == $post_status ) {
-			if ( 'page' == $post_type && ! current_user_can( 'publish_pages' ) ) {
-				return new IXR_Error( 401, __( 'Sorry, you do not have the right to publish this page.' ) );
-			} elseif ( ! current_user_can( 'publish_posts' ) ) {
-				return new IXR_Error( 401, __( 'Sorry, you do not have the right to publish this post.' ) );
-			}
+		if ( ('publish' == $post_status) ) {
+			if ( ( 'page' == $post_type ) && !current_user_can('publish_pages') )
+				return new IXR_Error(401, __('Sorry, you do not have the right to publish this page.'));
+			else if ( !current_user_can('publish_posts') )
+				return new IXR_Error(401, __('Sorry, you do not have the right to publish this post.'));
 		}

 		if ( $post_more )
@@ -4624,13 +4582,10 @@ class wp_xmlrpc_server extends IXR_Server {

 		// Only posts can be sticky
 		if ( $post_type == 'post' && isset( $content_struct['sticky'] ) ) {
-			$data = $newpost;
-			$data['sticky'] = $content_struct['sticky'];
-			$data['post_type'] = 'post';
-			$error = $this->_toggle_sticky( $data, true );
-			if ( $error ) {
-				return $error;
-			}
+			if ( $content_struct['sticky'] == true )
+				stick_post( $post_ID );
+			elseif ( $content_struct['sticky'] == false )
+				unstick_post( $post_ID );
 		}

 		if ( isset($content_struct['custom_fields']) )
--- a/wp-includes/compat.php
+++ b/wp-includes/compat.php
@@ -13,141 +13,23 @@ if ( !function_exists('_') ) {
 	}
 }

-/**
- * Returns whether PCRE/u (PCRE_UTF8 modifier) is available for use.
- *
- * @ignore
- * @since 4.2.2
- * @access private
- *
- * @param bool $set - Used for testing only
- *             null   : default - get PCRE/u capability
- *             false  : Used for testing - return false for future calls to this function
- *             'reset': Used for testing - restore default behavior of this function
- */
-function _wp_can_use_pcre_u( $set = null ) {
-	static $utf8_pcre = 'reset';
-
-	if ( null !== $set ) {
-		$utf8_pcre = $set;
-	}
-
-	if ( 'reset' === $utf8_pcre ) {
-		$utf8_pcre = @preg_match( '/^./u', 'a' );
-	}
-
-	return $utf8_pcre;
-}
-
-if ( ! function_exists( 'mb_substr' ) ) :
-	function mb_substr( $str, $start, $length = null, $encoding = null ) {
-		return _mb_substr( $str, $start, $length, $encoding );
+if ( !function_exists('mb_substr') ):
+	function mb_substr( $str, $start, $length=null, $encoding=null ) {
+		return _mb_substr($str, $start, $length, $encoding);
 	}
 endif;

-/*
- * Only understands UTF-8 and 8bit.  All other character sets will be treated as 8bit.
- * For $encoding === UTF-8, the $str input is expected to be a valid UTF-8 byte sequence.
- * The behavior of this function for invalid inputs is undefined.
- */
-function _mb_substr( $str, $start, $length = null, $encoding = null ) {
-	if ( null === $encoding ) {
-		$encoding = get_option( 'blog_charset' );
+function _mb_substr( $str, $start, $length=null, $encoding=null ) {
+	// the solution below, works only for utf-8, so in case of a different
+	// charset, just use built-in substr
+	$charset = get_option( 'blog_charset' );
+	if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
+		return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
 	}
-
-	// The solution below works only for UTF-8,
-	// so in case of a different charset just use built-in substr()
-	if ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
-		return is_null( $length ) ? substr( $str, $start ) : substr( $str, $start, $length );
-	}
-
-	if ( _wp_can_use_pcre_u() ) {
-		// Use the regex unicode support to separate the UTF-8 characters into an array
-		preg_match_all( '/./us', $str, $match );
-		$chars = is_null( $length ) ? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
-		return implode( '', $chars );
-	}
-
-	$regex = '/(
-		  [\x00-\x7F]                  # single-byte sequences   0xxxxxxx
-		| [\xC2-\xDF][\x80-\xBF]       # double-byte sequences   110xxxxx 10xxxxxx
-		| \xE0[\xA0-\xBF][\x80-\xBF]   # triple-byte sequences   1110xxxx 10xxxxxx * 2
-		| [\xE1-\xEC][\x80-\xBF]{2}
-		| \xED[\x80-\x9F][\x80-\xBF]
-		| [\xEE-\xEF][\x80-\xBF]{2}
-		| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
-		| [\xF1-\xF3][\x80-\xBF]{3}
-		| \xF4[\x80-\x8F][\x80-\xBF]{2}
-	)/x';
-
-	$chars = array( '' ); // Start with 1 element instead of 0 since the first thing we do is pop
-	do {
-		// We had some string left over from the last round, but we counted it in that last round.
-		array_pop( $chars );
-
-		// Split by UTF-8 character, limit to 1000 characters (last array element will contain the rest of the string)
-		$pieces = preg_split( $regex, $str, 1000, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY );
-
-		$chars = array_merge( $chars, $pieces );
-	} while ( count( $pieces ) > 1 && $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
-
-	return join( '', array_slice( $chars, $start, $length ) );
-}
-
-if ( ! function_exists( 'mb_strlen' ) ) :
-	function mb_strlen( $str, $encoding = null ) {
-		return _mb_strlen( $str, $encoding );
-	}
-endif;
-
-/*
- * Only understands UTF-8 and 8bit.  All other character sets will be treated as 8bit.
- * For $encoding === UTF-8, the $str input is expected to be a valid UTF-8 byte sequence.
- * The behavior of this function for invalid inputs is undefined.
- */
-function _mb_strlen( $str, $encoding = null ) {
-	if ( null === $encoding ) {
-		$encoding = get_option( 'blog_charset' );
-	}
-
-	// The solution below works only for UTF-8,
-	// so in case of a different charset just use built-in strlen()
-	if ( ! in_array( $encoding, array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ) ) {
-		return strlen( $str );
-	}
-
-	if ( _wp_can_use_pcre_u() ) {
-		// Use the regex unicode support to separate the UTF-8 characters into an array
-		preg_match_all( '/./us', $str, $match );
-		return count( $match[0] );
-	}
-
-	$regex = '/(?:
-		  [\x00-\x7F]                  # single-byte sequences   0xxxxxxx
-		| [\xC2-\xDF][\x80-\xBF]       # double-byte sequences   110xxxxx 10xxxxxx
-		| \xE0[\xA0-\xBF][\x80-\xBF]   # triple-byte sequences   1110xxxx 10xxxxxx * 2
-		| [\xE1-\xEC][\x80-\xBF]{2}
-		| \xED[\x80-\x9F][\x80-\xBF]
-		| [\xEE-\xEF][\x80-\xBF]{2}
-		| \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
-		| [\xF1-\xF3][\x80-\xBF]{3}
-		| \xF4[\x80-\x8F][\x80-\xBF]{2}
-	)/x';
-
-	$count = 1; // Start at 1 instead of 0 since the first thing we do is decrement
-	do {
-		// We had some string left over from the last round, but we counted it in that last round.
-		$count--;
-
-		// Split by UTF-8 character, limit to 1000 characters (last array element will contain the rest of the string)
-		$pieces = preg_split( $regex, $str, 1000 );
-
-		// Increment
-		$count += count( $pieces );
-	} while ( $str = array_pop( $pieces ) ); // If there's anything left over, repeat the loop.
-
-	// Fencepost: preg_split() always returns one extra item in the array
-	return --$count;
+	// use the regex unicode support to separate the UTF-8 characters into an array
+	preg_match_all( '/./us', $str, $match );
+	$chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
+	return implode( '', $chars );
 }

 if ( !function_exists('hash_hmac') ):
--- a/wp-includes/default-widgets.php
+++ b/wp-includes/default-widgets.php
@@ -1144,7 +1144,7 @@ class WP_Widget_Tag_Cloud extends WP_Widget {
 		?>
 		<p>
 			<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:') ?></label>
-			<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo esc_attr( $title ); ?>" />
+			<input type="text" class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" value="<?php echo $title; ?>" />
 		</p>
 		<p>
 			<label for="<?php echo $this->get_field_id('nav_menu'); ?>"><?php _e('Select Menu:'); ?></label>
--- a/wp-includes/formatting.php
+++ b/wp-includes/formatting.php
@@ -247,10 +247,6 @@ function wpautop($pee, $br = true) {
 	$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
 	$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
 	$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
-
-	// Find newlines in all elements and add placeholders.
-	$pee = wp_replace_in_html_tags( $pee, array( "\n" => " <!-- wpnl --> " ) );
-
 	if ( strpos($pee, '<object') !== false ) {
 		$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
 		$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
@@ -281,109 +277,9 @@ function wpautop($pee, $br = true) {
 	if ( !empty($pre_tags) )
 		$pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee);

-	// Restore newlines in all elements.
-	$pee = str_replace( " <!-- wpnl --> ", "\n", $pee );
-
 	return $pee;
 }

-/**
- * Separate HTML elements and comments from the text.
- *
- * @since 4.2.4
- *
- * @param string $input The text which has to be formatted.
- * @return array The formatted text.
- */
-function wp_html_split( $input ) {
-	static $regex;
-
-	if ( ! isset( $regex ) ) {
-		$comments =
-			  '!'           // Start of comment, after the <.
-			. '(?:'         // Unroll the loop: Consume everything until --> is found.
-			.     '-(?!->)' // Dash not followed by end of comment.
-			.     '[^\-]*+' // Consume non-dashes.
-			. ')*+'         // Loop possessively.
-			. '(?:-->)?';   // End of comment. If not found, match all input.
-
-		$cdata =
-			  '!\[CDATA\['  // Start of comment, after the <.
-			. '[^\]]*+'     // Consume non-].
-			. '(?:'         // Unroll the loop: Consume everything until ]]> is found.
-			.     '](?!]>)' // One ] not followed by end of comment.
-			.     '[^\]]*+' // Consume non-].
-			. ')*+'         // Loop possessively.
-			. '(?:]]>)?';   // End of comment. If not found, match all input.
-
-		$regex =
-			  '/('              // Capture the entire match.
-			.     '<'           // Find start of element.
-			.     '(?(?=!--)'   // Is this a comment?
-			.         $comments // Find end of comment.
-			.     '|'
-			.         '(?(?=!\[CDATA\[)' // Is this a comment?
-			.             $cdata // Find end of comment.
-			.         '|'
-			.             '[^>]*>?' // Find end of element. If not found, match all input.
-			.         ')'
-			.     ')'
-			. ')/s';
-	}
-
-	return preg_split( $regex, $input, -1, PREG_SPLIT_DELIM_CAPTURE );
-}
-
-/**
- * Replace characters or phrases within HTML elements only.
- *
- * @since 4.2.3
- *
- * @param string $haystack The text which has to be formatted.
- * @param array $replace_pairs In the form array('from' => 'to', ...).
- * @return string The formatted text.
- */
-function wp_replace_in_html_tags( $haystack, $replace_pairs ) {
-	// Find all elements.
-	$textarr = wp_html_split( $haystack );
-	$changed = false;
-
-	// Optimize when searching for one item.
-	if ( 1 === count( $replace_pairs ) ) {
-		// Extract $needle and $replace.
-		foreach ( $replace_pairs as $needle => $replace );
-
-		// Loop through delimeters (elements) only.
-		for ( $i = 1, $c = count( $textarr ); $i < $c; $i += 2 ) { 
-			if ( false !== strpos( $textarr[$i], $needle ) ) {
-				$textarr[$i] = str_replace( $needle, $replace, $textarr[$i] );
-				$changed = true;
-			}
-		}
-	} else {
-		// Extract all $needles.
-		$needles = array_keys( $replace_pairs );
-
-		// Loop through delimeters (elements) only.
-		for ( $i = 1, $c = count( $textarr ); $i < $c; $i += 2 ) { 
-			foreach ( $needles as $needle ) {
-				if ( false !== strpos( $textarr[$i], $needle ) ) {
-					$textarr[$i] = strtr( $textarr[$i], $replace_pairs );
-					$changed = true;
-					// After one strtr() break out of the foreach loop and look at next element.
-					break;
-				}
-			}
-		}
-	}
-
-	if ( $changed ) {
-		$haystack = implode( $textarr );
-	}
-
-	return $haystack;
-}
-
 /**
 * Newline preservation help function for wpautop
 *
@@ -966,8 +862,7 @@ function remove_accents($string) {
 * operating systems and special characters requiring special escaping
 * to manipulate at the command line. Replaces spaces and consecutive
 * dashes with a single dash. Trims period, dash and underscore from beginning
- * and end of filename. It is not guaranteed that this function will return a
- * filename that is allowed to be uploaded.
+ * and end of filename.
 *
 * @since 2.1.0
 *
@@ -990,14 +885,6 @@ function sanitize_file_name( $filename ) {
 	$filename = preg_replace('/[\s-]+/', '-', $filename);
 	$filename = trim($filename, '.-_');

-	if ( false === strpos( $filename, '.' ) ) {
-		$mime_types = wp_get_mime_types();
-		$filetype = wp_check_filetype( 'test.' . $filename, $mime_types );
-		if ( $filetype['ext'] === $filename ) {
-			$filename = 'unnamed-file.' . $filetype['ext'];
-		}
-	}
-
 	// Split the filename into a base and extension[s]
 	$parts = explode('.', $filename);

--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -1874,7 +1874,7 @@ function wp_check_filetype( $filename, $mimes = null ) {
 * If it's determined that the extension does not match the file's real type,
 * then the "proper_filename" value will be set with a proper filename and extension.
 *
- * Currently this function only supports renaming images validated via wp_get_image_mime().
+ * Currently this function only supports validating images known to getimagesize().
 *
 * @since 3.0.0
 *
@@ -1895,15 +1895,14 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 	if ( ! file_exists( $file ) )
 		return compact( 'ext', 'type', 'proper_filename' );

-	// Validate image types.
-	if ( $type && 0 === strpos( $type, 'image/' ) ) {
+	// We're able to validate images using GD
+	if ( $type && 0 === strpos( $type, 'image/' ) && function_exists('getimagesize') ) {

 		// Attempt to figure out what type of image it actually is
-		$real_mime = wp_get_image_mime( $file );
+		$imgstats = @getimagesize( $file );

-		if ( ! $real_mime ) {
-			$type = $ext = false;
-		} elseif ( $real_mime != $type ) {
+		// If getimagesize() knows what kind of image it really is and if the real MIME doesn't match the claimed MIME
+		if ( !empty($imgstats['mime']) && $imgstats['mime'] != $type ) {
 			// This is a simplified array of MIMEs that getimagesize() can detect and their extensions
 			// You shouldn't need to use this filter, but it's here just in case
 			$mime_to_ext = apply_filters( 'getimagesize_mimes_to_exts', array(
@@ -1915,10 +1914,10 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 			) );

 			// Replace whatever is after the last period in the filename with the correct extension
-			if ( ! empty( $mime_to_ext[ $real_mime ] ) ) {
+			if ( ! empty( $mime_to_ext[ $imgstats['mime'] ] ) ) {
 				$filename_parts = explode( '.', $filename );
 				array_pop( $filename_parts );
-				$filename_parts[] = $mime_to_ext[ $real_mime ];
+				$filename_parts[] = $mime_to_ext[ $imgstats['mime'] ];
 				$new_filename = implode( '.', $filename_parts );

 				if ( $new_filename != $filename )
@@ -1927,20 +1926,8 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 				// Redefine the extension / MIME
 				$wp_filetype = wp_check_filetype( $new_filename, $mimes );
 				extract( $wp_filetype );
-			} else {
-				$type = $ext = false;
 			}
 		}
-	} elseif ( function_exists( 'finfo_file' ) ) {
-		// Use finfo_file if available to validate non-image files.
-		$finfo = finfo_open( FILEINFO_MIME_TYPE );
-		$real_mime = finfo_file( $finfo, $file );
-		finfo_close( $finfo );
-
-		// If the extension does not match the file's real type, return false.
-		if ( $real_mime !== $type ) {
-			$type = $ext = false;
-		}
 	}

 	// Let plugins try and validate other types of files
@@ -1948,38 +1935,6 @@ function wp_check_filetype_and_ext( $file, $filename, $mimes = null ) {
 	return apply_filters( 'wp_check_filetype_and_ext', compact( 'ext', 'type', 'proper_filename' ), $file, $filename, $mimes );
 }

-/**
- * Returns the real mime type of an image file.
- *
- * This depends on exif_imagetype() or getimagesize() to determine real mime types.
- *
- * @since 4.7.1
- *
- * @param string $file Full path to the file.
- * @return string|false The actual mime type or false if the type cannot be determined.
- */
-function wp_get_image_mime( $file ) {
-	/*
-	 * Use exif_imagetype() to check the mimetype if available or fall back to
-	 * getimagesize() if exif isn't avaialbe. If either function throws an Exception
-	 * we assume the file could not be validated.
-	 */
-	try {
-		if ( is_callable( 'exif_imagetype' ) ) {
-			$mime = image_type_to_mime_type( exif_imagetype( $file ) );
-		} elseif ( function_exists( 'getimagesize' ) ) {
-			$imagesize = getimagesize( $file );
-			$mime = ( isset( $imagesize['mime'] ) ) ? $imagesize['mime'] : false;
-		} else {
-			$mime = false;
-		}
-	} catch ( Exception $e ) {
-		$mime = false;
-	}
-
-	return $mime;
-}
-
 /**
 * Retrieve list of mime types and file extensions.
 *
--- a/wp-includes/http.php
+++ b/wp-includes/http.php
@@ -472,7 +472,7 @@ function wp_http_validate_url( $url ) {

 	if ( ! $same_host ) {
 		$host = trim( $parsed_url['host'], '.' );
-		if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
+		if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) {
 			$ip = $host;
 		} else {
 			$ip = gethostbyname( $host );
@@ -481,7 +481,7 @@ function wp_http_validate_url( $url ) {
 		}
 		if ( $ip ) {
 			$parts = array_map( 'intval', explode( '.', $ip ) );
-			if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0]
+			if ( 127 === $parts[0] || 10 === $parts[0]
 				|| ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] )
 				|| ( 192 === $parts[0] && 168 === $parts[1] )
 			) {
--- a/wp-includes/js/plupload/plupload.flash.js
+++ b/wp-includes/js/plupload/plupload.flash.js
--- a/wp-includes/js/plupload/plupload.flash.swf
+++ b/wp-includes/js/plupload/plupload.flash.swf
--- a/wp-includes/kses.php
+++ b/wp-includes/kses.php
@@ -486,82 +486,6 @@ function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {
 	return wp_kses_split($string, $allowed_html, $allowed_protocols);
 }

-/**
- * Filters one attribute only and ensures its value is allowed.
- *
- * This function has the advantage of being more secure than esc_attr() and can
- * escape data in some situations where wp_kses() must strip the whole attribute.
- *
- * @since 4.2.3
- *
- * @param string $string The 'whole' attribute, including name and value.
- * @param string $element The element name to which the attribute belongs.
- * @return string Filtered attribute.
- */
-function wp_kses_one_attr( $string, $element ) {
-	$uris = array('xmlns', 'profile', 'href', 'src', 'cite', 'classid', 'codebase', 'data', 'usemap', 'longdesc', 'action');
-	$allowed_html = wp_kses_allowed_html( 'post' );
-	$allowed_protocols = wp_allowed_protocols();
-	$string = wp_kses_no_null( $string, array( 'slash_zero' => 'keep' ) );
-	$string = wp_kses_js_entities( $string );
-	$string = wp_kses_normalize_entities( $string );
-
-	// Preserve leading and trailing whitespace.
-	$matches = array();
-	preg_match('/^\s*/', $string, $matches);
-	$lead = $matches[0];
-	preg_match('/\s*$/', $string, $matches);
-	$trail = $matches[0];
-	if ( empty( $trail ) ) {
-		$string = substr( $string, strlen( $lead ) );
-	} else {
-		$string = substr( $string, strlen( $lead ), -strlen( $trail ) );
-	}
-	
-	// Parse attribute name and value from input.
-	$split = preg_split( '/\s*=\s*/', $string, 2 );
-	$name = $split[0];
-	if ( count( $split ) == 2 ) {
-		$value = $split[1];
-
-		// Remove quotes surrounding $value.
-		// Also guarantee correct quoting in $string for this one attribute.
-		if ( '' == $value ) {
-			$quote = '';
-		} else {
-			$quote = $value[0];
-		}
-		if ( '"' == $quote || "'" == $quote ) {
-			if ( substr( $value, -1 ) != $quote ) {
-				return '';
-			}
-			$value = substr( $value, 1, -1 );
-		} else {
-			$quote = '"';
-		}
-
-		// Sanitize quotes and angle braces.
-		$value = htmlspecialchars( $value, ENT_QUOTES, null, false );
-
-		// Sanitize URI values.
-		if ( in_array( strtolower( $name ), $uris ) ) {
-			$value = wp_kses_bad_protocol( $value, $allowed_protocols );
-		}
-
-		$string = "$name=$quote$value$quote";
-		$vless = 'n';
-	} else {
-		$value = '';
-		$vless = 'y';
-	}
-	
-	// Sanitize attribute by name.
-	wp_kses_attr_check( $name, $value, $string, $vless, $element, $allowed_html );
-
-	// Restore whitespace.
-	return $lead . $string . $trail;
-}
-
 /**
 * Return a list of allowed tags and attributes for a given context.
 *
@@ -759,11 +683,45 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
 	# Go through $attrarr, and save the allowed attributes for this element
 	# in $attr2
 	$attr2 = '';
-	foreach ( $attrarr as $arreach ) {
-		if ( wp_kses_attr_check( $arreach['name'], $arreach['value'], $arreach['whole'], $arreach['vless'], $element, $allowed_html ) ) {
-			$attr2 .= ' '.$arreach['whole'];
+
+	$allowed_attr = $allowed_html[strtolower($element)];
+	foreach ($attrarr as $arreach) {
+		if ( ! isset( $allowed_attr[strtolower($arreach['name'])] ) )
+			continue; # the attribute is not allowed
+
+		$current = $allowed_attr[strtolower($arreach['name'])];
+		if ( $current == '' )
+			continue; # the attribute is not allowed
+
+		if ( strtolower( $arreach['name'] ) == 'style' ) {
+			$orig_value = $arreach['value'];
+			$value = safecss_filter_attr( $orig_value );
+
+			if ( empty( $value ) )
+				continue;
+
+			$arreach['value'] = $value;
+			$arreach['whole'] = str_replace( $orig_value, $value, $arreach['whole'] );
 		}
-	}
+
+		if ( ! is_array($current) ) {
+			$attr2 .= ' '.$arreach['whole'];
+		# there are no checks
+
+		} else {
+			# there are some checks
+			$ok = true;
+			foreach ($current as $currkey => $currval) {
+				if ( ! wp_kses_check_attr_val($arreach['value'], $arreach['vless'], $currkey, $currval) ) {
+					$ok = false;
+					break;
+				}
+			}
+
+			if ( $ok )
+				$attr2 .= ' '.$arreach['whole']; # it passed them
+		} # if !is_array($current)
+	} # foreach

 	# Remove any "<" or ">" characters
 	$attr2 = preg_replace('/[<>]/', '', $attr2);
@@ -771,53 +729,6 @@ function wp_kses_attr($element, $attr, $allowed_html, $allowed_protocols) {
 	return "<$element$attr2$xhtml_slash>";
 }

-/**
- * Determine whether an attribute is allowed.
- *
- * @since 4.2.3
- *
- * @param string $name The attribute name. Returns empty string when not allowed.
- * @param string $value The attribute value. Returns a filtered value.
- * @param string $whole The name=value input. Returns filtered input.
- * @param string $vless 'y' when attribute like "enabled", otherwise 'n'.
- * @param string $element The name of the element to which this attribute belongs.
- * @param array $allowed_html The full list of allowed elements and attributes.
- * @return bool Is the attribute allowed?
- */
-function wp_kses_attr_check( &$name, &$value, &$whole, $vless, $element, $allowed_html ) {
-	$allowed_attr = $allowed_html[strtolower( $element )];
-
-	$name_low = strtolower( $name );
-	if ( ! isset( $allowed_attr[$name_low] ) || '' == $allowed_attr[$name_low] ) {
-		$name = $value = $whole = '';
-		return false;
-	}
-
-	if ( 'style' == $name_low ) {
-		$new_value = safecss_filter_attr( $value );
-
-		if ( empty( $new_value ) ) {
-			$name = $value = $whole = '';
-			return false;
-		}
-
-		$whole = str_replace( $value, $new_value, $whole );
-		$value = $new_value;
-	}
-
-	if ( is_array( $allowed_attr[$name_low] ) ) {
-		// there are some checks
-		foreach ( $allowed_attr[$name_low] as $currkey => $currval ) {
-			if ( ! wp_kses_check_attr_val( $value, $vless, $currkey, $currval ) ) {
-				$name = $value = $whole = '';
-				return false;
-			}
-		}
-	}
-
-	return true;
-}
-
 /**
 * Builds an attribute list from string containing attributes.
 *
@@ -947,109 +858,6 @@ function wp_kses_hair($attr, $allowed_protocols) {
 	return $attrarr;
 }

-/**
- * Finds all attributes of an HTML element.
- *
- * Does not modify input.  May return "evil" output.
- *
- * Based on wp_kses_split2() and wp_kses_attr()
- *
- * @since 4.2.3
- *
- * @param string $element HTML element/tag
- * @return array|bool List of attributes found in $element. Returns false on failure.
- */
-function wp_kses_attr_parse( $element ) {
-	$valid = preg_match('%^(<\s*)(/\s*)?([a-zA-Z0-9]+\s*)([^>]*)(>?)$%', $element, $matches);
-	if ( 1 !== $valid ) {
-		return false;
-	}
-
-	$begin =  $matches[1];
-	$slash =  $matches[2];
-	$elname = $matches[3];
-	$attr =   $matches[4];
-	$end =    $matches[5];
-
-	if ( '' !== $slash ) {
-		// Closing elements do not get parsed.
-		return false;
-	}
-
-	// Is there a closing XHTML slash at the end of the attributes?
-	if ( 1 === preg_match( '%\s*/\s*$%', $attr, $matches ) ) {
-		$xhtml_slash = $matches[0];
-		$attr = substr( $attr, 0, -strlen( $xhtml_slash ) );
-	} else {
-		$xhtml_slash = '';
-	}
-	
-	// Split it
-	$attrarr = wp_kses_hair_parse( $attr );
-	if ( false === $attrarr ) {
-		return false;
-	}
-
-	// Make sure all input is returned by adding front and back matter.
-	array_unshift( $attrarr, $begin . $slash . $elname );
-	array_push( $attrarr, $xhtml_slash . $end );
-	
-	return $attrarr;
-}
-
-/**
- * Builds an attribute list from string containing attributes.
- *
- * Does not modify input.  May return "evil" output.
- * In case of unexpected input, returns false instead of stripping things.
- *
- * Based on wp_kses_hair() but does not return a multi-dimensional array.
- *
- * @since 4.2.3
- *
- * @param string $attr Attribute list from HTML element to closing HTML element tag
- * @return array|bool List of attributes found in $attr. Returns false on failure.
- */
-function wp_kses_hair_parse( $attr ) {
-	if ( '' === $attr ) {
-		return array();
-	}
-
-	$regex =
-	  '(?:'
-	.     '[-a-zA-Z:]+'   // Attribute name.
-	. '|'
-	.     '\[\[?[^\[\]]+\]\]?' // Shortcode in the name position implies unfiltered_html.
-	. ')'
-	. '(?:'               // Attribute value.
-	.     '\s*=\s*'       // All values begin with '='
-	.     '(?:'
-	.         '"[^"]*"'   // Double-quoted
-	.     '|'
-	.         "'[^']*'"   // Single-quoted
-	.     '|'
-	.         '[^\s"\']+' // Non-quoted
-	.         '(?:\s|$)'  // Must have a space
-	.     ')'
-	. '|'
-	.     '(?:\s|$)'      // If attribute has no value, space is required.
-	. ')'
-	. '\s*';              // Trailing space is optional except as mentioned above.
-
-	// Although it is possible to reduce this procedure to a single regexp,
-	// we must run that regexp twice to get exactly the expected result.
-
-	$validation = "%^($regex)+$%";
-	$extraction = "%$regex%";
-
-	if ( 1 === preg_match( $validation, $attr ) ) {
-		preg_match_all( $extraction, $attr, $attrarr );
-		return $attrarr[0];
-	} else {
-		return false;
-	}
-}
-
 /**
 * Performs different checks for attribute values.
 *
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -634,8 +634,6 @@ function img_caption_shortcode($attr, $content = null) {
 			$content = $matches[1];
 			$attr['caption'] = trim( $matches[2] );
 		}
-	} elseif ( strpos( $attr['caption'], '<' ) !== false ) {
-		$attr['caption'] = wp_kses( $attr['caption'], 'post' );
 	}

 	// Allow plugins/themes to override the default caption template.
@@ -1639,7 +1637,7 @@ function wp_plupload_default_settings() {
 	$max_upload_size = wp_max_upload_size();

 	$defaults = array(
-		'runtimes'            => 'html5,silverlight,html4',
+		'runtimes'            => 'html5,silverlight,flash,html4',
 		'file_data_name'      => 'async-upload', // key passed to $_FILE.
 		'multiple_queues'     => true,
 		'max_file_size'       => $max_upload_size . 'b',
--- a/wp-includes/ms-functions.php
+++ b/wp-includes/ms-functions.php
@@ -715,7 +715,7 @@ function wpmu_validate_blog_signup( $blogname, $blog_title, $user = '' ) {
 function wpmu_signup_blog( $domain, $path, $title, $user, $user_email, $meta = array() )  {
 	global $wpdb;

-	$key = substr( md5( time() . wp_rand() . $domain ), 0, 16 );
+	$key = substr( md5( time() . rand() . $domain ), 0, 16 );
 	$meta = serialize($meta);

 	$wpdb->insert( $wpdb->signups, array(
@@ -751,7 +751,7 @@ function wpmu_signup_user( $user, $user_email, $meta = array() ) {
 	// Format data
 	$user = preg_replace( '/\s+/', '', sanitize_user( $user, true ) );
 	$user_email = sanitize_email( $user_email );
-	$key = substr( md5( time() . wp_rand() . $user_email ), 0, 16 );
+	$key = substr( md5( time() . rand() . $user_email ), 0, 16 );
 	$meta = serialize($meta);

 	$wpdb->insert( $wpdb->signups, array(
--- a/wp-includes/pluggable.php
+++ b/wp-includes/pluggable.php
@@ -755,14 +755,10 @@ function auth_redirect() {
 		}
 	}

-	/**
-	 * Filters the authentication redirect scheme.
-	 *
-	 * @since 2.9.0
-	 *
-	 * @param string $scheme Authentication redirect scheme. Default empty.
-	 */
-	$scheme = apply_filters( 'auth_redirect_scheme', '' );
+	if ( is_user_admin() )
+		$scheme = 'logged_in';
+	else
+		$scheme = apply_filters( 'auth_redirect_scheme', '' );

 	if ( $user_id = wp_validate_auth_cookie( '',  $scheme) ) {
 		do_action('auth_redirect', $user_id);
@@ -977,8 +973,7 @@ function wp_validate_redirect($location, $default = '') {
 	// In php 5 parse_url may fail if the URL query part contains http://, bug #38143
 	$test = ( $cut = strpos($location, '?') ) ? substr( $location, 0, $cut ) : $location;

-	// @-operator is used to prevent possible warnings in PHP < 5.3.3.
-	$lp = @parse_url($test);
+	$lp  = parse_url($test);

 	// Give up if malformed URL
 	if ( false === $lp )
@@ -988,17 +983,9 @@ function wp_validate_redirect($location, $default = '') {
 	if ( isset($lp['scheme']) && !('http' == $lp['scheme'] || 'https' == $lp['scheme']) )
 		return $default;

-	// Reject if certain components are set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
-	if ( ! isset( $lp['host'] ) && ( isset( $lp['scheme'] ) || isset( $lp['user'] ) || isset( $lp['pass'] ) || isset( $lp['port'] ) ) ) {
+	// Reject if scheme is set but host is not. This catches urls like https:host.com for which parse_url does not set the host field.
+	if ( isset($lp['scheme'])  && !isset($lp['host']) )
 		return $default;
-	}
-
-	// Reject malformed components parse_url() can return on odd inputs.
-	foreach ( array( 'user', 'pass', 'host' ) as $component ) {
-		if ( isset( $lp[ $component ] ) && strpbrk( $lp[ $component ], ':/?#@' ) ) {
-			return $default;
-		}
-	}

 	$wpp = parse_url(home_url());

--- a/wp-includes/post-template.php
+++ b/wp-includes/post-template.php
@@ -1204,7 +1204,7 @@ function wp_get_attachment_link( $id = 0, $size = 'thumbnail', $permalink = fals
 	if ( trim( $link_text ) == '' )
 		$link_text = $_post->post_title;

-	return apply_filters( 'wp_get_attachment_link', "<a href='" . esc_url( $url ) . "'>$link_text</a>", $id, $size, $permalink, $icon, $text );
+	return apply_filters( 'wp_get_attachment_link', "<a href='$url'>$link_text</a>", $id, $size, $permalink, $icon, $text );
 }

 /**
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -2534,11 +2534,10 @@ function wp_untrash_post_comments($post = null) {

 	foreach ( $group_by_status as $status => $comments ) {
 		// Sanity check. This shouldn't happen.
-		if ( 'post-trashed' == $status ) {
+		if ( 'post-trashed' == $status )
 			$status = '0';
-		}
-		$comments_in = implode( ', ', array_map( 'intval', $comments ) );
-		$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->comments SET comment_approved = %s WHERE comment_ID IN ($comments_in)", $status ) );
+		$comments_in = implode( "', '", $comments );
+		$wpdb->query( "UPDATE $wpdb->comments SET comment_approved = '$status' WHERE comment_ID IN ('" . $comments_in . "')" );
 	}

 	clean_comment_cache( array_keys($statuses) );
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -244,15 +244,12 @@ function wp_default_scripts( &$scripts ) {

 	$scripts->add( 'plupload', '/wp-includes/js/plupload/plupload.js', array(), '1.5.7' );
 	$scripts->add( 'plupload-html5', '/wp-includes/js/plupload/plupload.html5.js', array('plupload'), '1.5.7' );
-
-	// Not used, kept for dependency back-compat.
-	$scripts->add( 'plupload-flash', false, array(), '1.5.7' );
-
+	$scripts->add( 'plupload-flash', '/wp-includes/js/plupload/plupload.flash.js', array('plupload'), '1.5.7' );
 	$scripts->add( 'plupload-silverlight', '/wp-includes/js/plupload/plupload.silverlight.js', array('plupload'), '1.5.7' );
 	$scripts->add( 'plupload-html4', '/wp-includes/js/plupload/plupload.html4.js', array('plupload'), '1.5.7' );

 	// cannot use the plupload.full.js, as it loads browserplus init JS from Yahoo
-	$scripts->add( 'plupload-all', false, array('plupload', 'plupload-html5', 'plupload-silverlight', 'plupload-html4'), '1.5.7' );
+	$scripts->add( 'plupload-all', false, array('plupload', 'plupload-html5', 'plupload-flash', 'plupload-silverlight', 'plupload-html4'), '1.5.7' );

 	$scripts->add( 'plupload-handlers', "/wp-includes/js/plupload/handlers$suffix.js", array('plupload-all', 'jquery') );
 	did_action( 'init' ) && $scripts->localize( 'plupload-handlers', 'pluploadL10n', $uploader_l10n );
--- a/wp-includes/shortcodes.php
+++ b/wp-includes/shortcodes.php
@@ -176,37 +176,16 @@ function has_shortcode( $content, $tag ) {
 * @uses get_shortcode_regex() Gets the search pattern for searching shortcodes.
 *
 * @param string $content Content to search for shortcodes
- * @param bool $ignore_html When true, shortcodes inside HTML elements will be skipped.
 * @return string Content with shortcodes filtered out.
 */
-function do_shortcode( $content, $ignore_html = false ) {
+function do_shortcode($content) {
 	global $shortcode_tags;

-	if ( false === strpos( $content, '[' ) ) {
-		return $content;
-	}
-
 	if (empty($shortcode_tags) || !is_array($shortcode_tags))
 		return $content;

-	$tagnames = array_keys($shortcode_tags);
-	$tagregexp = join( '|', array_map('preg_quote', $tagnames) );
-	$pattern = "/\\[($tagregexp)/s";
-
-	if ( 1 !== preg_match( $pattern, $content ) ) {
-		// Avoids parsing HTML when there are no shortcodes or embeds anyway.
-		return $content;
-	}
-
-	$content = do_shortcodes_in_html_tags( $content, $ignore_html );
-
 	$pattern = get_shortcode_regex();
-	$content = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $content );
-	
-	// Always restore square braces so we don't break things like <!--[if IE ]>
-	$content = unescape_invalid_shortcodes( $content );
-	
-	return $content;
+	return preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $content );
 }

 /**
@@ -298,127 +277,6 @@ function do_shortcode_tag( $m ) {
 	}
 }

-/**
- * Search only inside HTML elements for shortcodes and process them.
- *
- * Any [ or ] characters remaining inside elements will be HTML encoded
- * to prevent interference with shortcodes that are outside the elements.
- * Assumes $content processed by KSES already.  Users with unfiltered_html
- * capability may get unexpected output if angle braces are nested in tags.
- *
- * @since 4.2.3
- *
- * @param string $content Content to search for shortcodes
- * @param bool $ignore_html When true, all square braces inside elements will be encoded.
- * @return string Content with shortcodes filtered out.
- */
-function do_shortcodes_in_html_tags( $content, $ignore_html ) {
-	// Normalize entities in unfiltered HTML before adding placeholders.
-	$trans = array( '&#91;' => '&#091;', '&#93;' => '&#093;' );
-	$content = strtr( $content, $trans );
-	$trans = array( '[' => '&#91;', ']' => '&#93;' );
-	
-	$pattern = get_shortcode_regex();
-	$textarr = wp_html_split( $content );
-
-	foreach ( $textarr as &$element ) {
-		if ( '' == $element || '<' !== $element[0] ) {
-			continue;
-		}
-
-		$noopen = false === strpos( $element, '[' );
-		$noclose = false === strpos( $element, ']' );
-		if ( $noopen || $noclose ) {
-			// This element does not contain shortcodes.
-			if ( $noopen xor $noclose ) {
-				// Need to encode stray [ or ] chars.
-				$element = strtr( $element, $trans );
-			}
-			continue;
-		}
-
-		if ( $ignore_html || '<!--' === substr( $element, 0, 4 ) || '<![CDATA[' === substr( $element, 0, 9 ) ) {
-			// Encode all [ and ] chars.
-			$element = strtr( $element, $trans );
-			continue;
-		}
-
-		$attributes = wp_kses_attr_parse( $element );
-		if ( false === $attributes ) {
-			// Some plugins are doing things like [name] <[email]>.
-			if ( 1 === preg_match( '%^<\s*\[\[?[^\[\]]+\]%', $element ) ) {
-				$element = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $element );
-			}
-
-			// Looks like we found some crazy unfiltered HTML.  Skipping it for sanity.
-			$element = strtr( $element, $trans );
-			continue;
-		}
-		
-		// Get element name
-		$front = array_shift( $attributes );
-		$back = array_pop( $attributes );
-		$matches = array();
-		preg_match('%[a-zA-Z0-9]+%', $front, $matches);
-		$elname = $matches[0];
-		
-		// Look for shortcodes in each attribute separately.
-		foreach ( $attributes as &$attr ) {
-			$open = strpos( $attr, '[' );
-			$close = strpos( $attr, ']' );
-			if ( false === $open || false === $close ) {
-				continue; // Go to next attribute.  Square braces will be escaped at end of loop.
-			}
-			$double = strpos( $attr, '"' );
-			$single = strpos( $attr, "'" );
-			if ( ( false === $single || $open < $single ) && ( false === $double || $open < $double ) ) {
-				// $attr like '[shortcode]' or 'name = [shortcode]' implies unfiltered_html.
-				// In this specific situation we assume KSES did not run because the input
-				// was written by an administrator, so we should avoid changing the output
-				// and we do not need to run KSES here.
-				$attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr );
-			} else {
-				// $attr like 'name = "[shortcode]"' or "name = '[shortcode]'"
-				// We do not know if $content was unfiltered. Assume KSES ran before shortcodes.
-				$count = 0;
-				$new_attr = preg_replace_callback( "/$pattern/s", 'do_shortcode_tag', $attr, -1, $count );
-				if ( $count > 0 ) {
-					// Sanitize the shortcode output using KSES.
-					$new_attr = wp_kses_one_attr( $new_attr, $elname );
-					if ( '' !== $new_attr ) {
-						// The shortcode is safe to use now.
-						$attr = $new_attr;
-					}
-				}
-			}
-		}
-		$element = $front . implode( '', $attributes ) . $back;
-		
-		// Now encode any remaining [ or ] chars.
-		$element = strtr( $element, $trans );
-	}
-	
-	$content = implode( '', $textarr );
-	
-	return $content;
-}
-
-/**
- * Remove placeholders added by do_shortcodes_in_html_tags().
- *
- * @since 4.2.3
- *
- * @param string $content Content to search for placeholders.
- * @return string Content with placeholders removed.
- */
-function unescape_invalid_shortcodes( $content ) {
-        // Clean up entire string, avoids re-parsing HTML.
-        $trans = array( '&#91;' => '[', '&#93;' => ']' );
-        $content = strtr( $content, $trans );
-        
-        return $content;
-}
-
 /**
 * Retrieve all attributes from the shortcodes tag.
 *
@@ -448,15 +306,6 @@ function shortcode_parse_atts($text) {
 			elseif (isset($m[8]))
 				$atts[] = stripcslashes($m[8]);
 		}
-
-		// Reject any unclosed HTML elements
-		foreach( $atts as &$value ) {
-			if ( false !== strpos( $value, '<' ) ) {
-				if ( 1 !== preg_match( '/^[^<]*+(?:<[^>]*+>[^<]*+)*+$/', $value ) ) {
-					$value = '';
-				}
-			}
-		}
 	} else {
 		$atts = ltrim($text);
 	}
@@ -522,15 +371,9 @@ function strip_shortcodes( $content ) {
 	if (empty($shortcode_tags) || !is_array($shortcode_tags))
 		return $content;

-	$content = do_shortcodes_in_html_tags( $content, true );
-
 	$pattern = get_shortcode_regex();
-	$content = preg_replace_callback( "/$pattern/s", 'strip_shortcode_tag', $content );

-	// Always restore square braces so we don't break things like <!--[if IE ]>
-	$content = unescape_invalid_shortcodes( $content );
-	
-	return $content;
+	return preg_replace_callback( "/$pattern/s", 'strip_shortcode_tag', $content );
 }

 function strip_shortcode_tag( $m ) {
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -589,7 +589,7 @@ function get_objects_in_term( $term_ids, $taxonomies, $args = array() ) {

 	$term_ids = array_map('intval', $term_ids );

-	$taxonomies = "'" . implode( "', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
+	$taxonomies = "'" . implode( "', '", $taxonomies ) . "'";
 	$term_ids = "'" . implode( "', '", $term_ids ) . "'";

 	$object_ids = $wpdb->get_col("SELECT tr.object_id FROM $wpdb->term_relationships AS tr INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ($taxonomies) AND tt.term_id IN ($term_ids) ORDER BY tr.object_id $order");
@@ -1348,7 +1348,7 @@ function get_terms($taxonomies, $args = '') {
 	if ( '' !== $order && !in_array( $order, array( 'ASC', 'DESC' ) ) )
 		$order = 'ASC';

-	$where = "tt.taxonomy IN ('" . implode("', '", array_map( 'esc_sql', $taxonomies ) ) . "')";
+	$where = "tt.taxonomy IN ('" . implode("', '", $taxonomies) . "')";
 	$inclusions = '';
 	if ( ! empty( $include ) ) {
 		$exclude = '';
@@ -2027,7 +2027,7 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 	if ( '' !== $order && ! in_array( $order, array( 'ASC', 'DESC' ) ) )
 		$order = 'ASC';

-	$taxonomies = "'" . implode("', '", array_map( 'esc_sql', $taxonomies ) ) . "'";
+	$taxonomies = "'" . implode("', '", $taxonomies) . "'";
 	$object_ids = implode(', ', $object_ids);

 	$select_this = '';
--- a/wp-includes/theme.php
+++ b/wp-includes/theme.php
@@ -665,6 +665,8 @@ function preview_theme() {

 	// Prevent theme mods to current theme being used on theme being previewed
 	add_filter( 'pre_option_theme_mods_' . get_option( 'stylesheet' ), '__return_empty_array' );
+
+	ob_start( 'preview_theme_ob_filter' );
 }
 add_action('setup_theme', 'preview_theme');

@@ -702,7 +704,7 @@ function _preview_theme_stylesheet_filter() {
 * @return string
 */
 function preview_theme_ob_filter( $content ) {
-	return $content;
+	return preg_replace_callback( "|(<a.*?href=([\"']))(.*?)([\"'].*?>)|", 'preview_theme_ob_filter_callback', $content );
 }

 /**
@@ -717,7 +719,26 @@ function preview_theme_ob_filter( $content ) {
 * @return string
 */
 function preview_theme_ob_filter_callback( $matches ) {
-	return $matches[0];
+	if ( strpos($matches[4], 'onclick') !== false )
+		$matches[4] = preg_replace('#onclick=([\'"]).*?(?<!\\\)\\1#i', '', $matches[4]); //Strip out any onclicks from rest of <a>. (?<!\\\) means to ignore the '" if it's escaped by \  to prevent breaking mid-attribute.
+	if (
+		( false !== strpos($matches[3], '/wp-admin/') )
+	||
+		( false !== strpos( $matches[3], '://' ) && 0 !== strpos( $matches[3], home_url() ) )
+	||
+		( false !== strpos($matches[3], '/feed/') )
+	||
+		( false !== strpos($matches[3], '/trackback/') )
+	)
+		return $matches[1] . "#$matches[2] onclick=$matches[2]return false;" . $matches[4];
+
+	$stylesheet = isset( $_GET['stylesheet'] ) ? $_GET['stylesheet'] : '';
+	$template   = isset( $_GET['template'] )   ? $_GET['template']   : '';
+
+	$link = add_query_arg( array( 'preview' => 1, 'template' => $template, 'stylesheet' => $stylesheet, 'preview_iframe' => 1 ), $matches[3] );
+	if ( 0 === strpos($link, 'preview=1') )
+		$link = "?$link";
+	return $matches[1] . esc_attr( $link ) . $matches[4];
 }

 /**
--- a/wp-includes/update.php
+++ b/wp-includes/update.php
@@ -154,20 +154,7 @@ function wp_version_check( $extra_stats = array(), $force_check = false ) {
 	if ( isset( $body['translations'] ) )
 		$updates->translations = $body['translations'];

-	set_site_transient( 'update_core', $updates );
-
-	if ( ! empty( $body['ttl'] ) ) {
-		$ttl = (int) $body['ttl'];
-		if ( $ttl && ( time() + $ttl < wp_next_scheduled( 'wp_version_check' ) ) ) {
-			// Queue an event to re-run the update check in $ttl seconds.
-			wp_schedule_single_event( time() + $ttl, 'wp_version_check' );
-		}
-	}
-
-	// Trigger background updates if running non-interactively, and we weren't called from the update handler.
-	if ( defined( 'DOING_CRON' ) && DOING_CRON && 'wp_maybe_auto_update' != current_filter() ) {
-		do_action( 'wp_maybe_auto_update' );
-	}
+	set_site_transient( 'update_core',  $updates);
 }

 /**
@@ -218,11 +205,7 @@ function wp_update_plugins( $extra_stats = array() ) {
 			$timeout = HOUR_IN_SECONDS;
 			break;
 		default :
-			if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
-				$timeout = 0;
-			} else {
-				$timeout = 12 * HOUR_IN_SECONDS;
-			}
+			$timeout = 12 * HOUR_IN_SECONDS;
 	}

 	$time_not_changed = isset( $current->last_checked ) && $timeout > ( time() - $current->last_checked );
@@ -369,11 +352,7 @@ function wp_update_themes( $extra_stats = array() ) {
 			$timeout = HOUR_IN_SECONDS;
 			break;
 		default :
-			if ( defined( 'DOING_CRON' ) && DOING_CRON ) {
-				$timeout = 0;
-			} else {
-				$timeout = 12 * HOUR_IN_SECONDS;
-			}
+			$timeout = 12 * HOUR_IN_SECONDS;
 	}

 	$time_not_changed = isset( $last_update->last_checked ) && $timeout > ( time() - $last_update->last_checked );
@@ -614,8 +593,19 @@ function wp_schedule_update_checks() {
 	if ( !wp_next_scheduled('wp_update_themes') && !defined('WP_INSTALLING') )
 		wp_schedule_event(time(), 'twicedaily', 'wp_update_themes');

-	if ( ( wp_next_scheduled( 'wp_maybe_auto_update' ) > ( time() + HOUR_IN_SECONDS ) ) && ! defined('WP_INSTALLING') )
-		wp_clear_scheduled_hook( 'wp_maybe_auto_update' );
+	if ( ! wp_next_scheduled( 'wp_maybe_auto_update' ) && ! defined( 'WP_INSTALLING' ) ) {
+		// Schedule auto updates for 7 a.m. and 7 p.m. in the timezone of the site.
+		$next = strtotime( 'today 7am' );
+		$now = time();
+		// Find the next instance of 7 a.m. or 7 p.m., but skip it if it is within 3 hours from now.
+		while ( ( $now + 3 * HOUR_IN_SECONDS ) > $next ) {
+			$next += 12 * HOUR_IN_SECONDS;
+		}
+		$next = $next - get_option( 'gmt_offset' ) * HOUR_IN_SECONDS;
+		// Add a random number of minutes, so we don't have all sites trying to update exactly on the hour
+		$next = $next + rand( 0, 59 ) * MINUTE_IN_SECONDS;
+		wp_schedule_event( $next, 'twicedaily', 'wp_maybe_auto_update' );
+	}
 }

 if ( ( ! is_main_site() && ! is_network_admin() ) || ( defined( 'DOING_AJAX' ) && DOING_AJAX ) )
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,14 +4,14 @@
 *
 * @global string $wp_version
 */
-$wp_version = '3.8.17';
+$wp_version = '3.8.6';

 /**
 * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.
 *
 * @global int $wp_db_version
 */
-$wp_db_version = 26694;
+$wp_db_version = 26692;

 /**
 * Holds the TinyMCE version
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -1379,8 +1379,6 @@ class wpdb {
 	 * @return int|false The number of rows affected, or false on error.
 	 */
 	function _insert_replace_helper( $table, $data, $format = null, $type = 'INSERT' ) {
-		$this->insert_id = 0;
-
 		if ( ! in_array( strtoupper( $type ), array( 'REPLACE', 'INSERT' ) ) ) {
 			return false;
 		}
@@ -1401,6 +1399,7 @@ class wpdb {

 		$sql = "$type INTO `$table` ($fields) VALUES ($formats)";

+		$this->insert_id = 0;
 		$this->check_current_query = false;
 		return $this->query( $this->prepare( $sql, $values ) );
 	}
@@ -1522,20 +1521,11 @@ class wpdb {
 	 */
 	protected function process_fields( $table, $data, $format ) {
 		$data = $this->process_field_formats( $data, $format );
-		if ( false === $data ) {
-			return false;
-		}
-
 		$data = $this->process_field_charsets( $data, $table );
 		if ( false === $data ) {
 			return false;
 		}

-		$data = $this->process_field_lengths( $data, $table );
-		if ( false === $data ) {
-			return false;
-		}
-
 		$converted_data = $this->strip_invalid_text( $data );

 		if ( $data !== $converted_data ) {
@@ -1597,41 +1587,17 @@ class wpdb {
 				// We can skip this field if we know it isn't a string.
 				// This checks %d/%f versus ! %s because it's sprintf() could take more.
 				$value['charset'] = false;
+			} elseif ( $this->check_ascii( $value['value'] ) ) {
+				// If it's ASCII, then we don't need the charset. We can skip this field.
+				$value['charset'] = false;
 			} else {
 				$value['charset'] = $this->get_col_charset( $table, $field );
 				if ( is_wp_error( $value['charset'] ) ) {
 					return false;
 				}
-			}

-			$data[ $field ] = $value;
-		}
-
-		return $data;
-	}
-
-	/**
-	 * For string fields, record the maximum string length that field can safely save.
-	 *
-	 * @since 4.2.1
-	 * @access protected
-	 *
-	 * @param array  $data  As it comes from the wpdb::process_field_charsets() method.
-	 * @param string $table Table name.
-	 * @return array|False The same array as $data with additional 'length' keys, or false if
-	 *                     any of the values were too long for their corresponding field.
-	 */
-	protected function process_field_lengths( $data, $table ) {
-		foreach ( $data as $field => $value ) {
-			if ( '%d' === $value['format'] || '%f' === $value['format'] ) {
-				// We can skip this field if we know it isn't a string.
-				// This checks %d/%f versus ! %s because it's sprintf() could take more.
-				$value['length'] = false;
-			} else {
-				$value['length'] = $this->get_col_length( $table, $field );
-				if ( is_wp_error( $value['length'] ) ) {
-					return false;
-				}
+				// This isn't ASCII. Don't have strip_invalid_text() re-check.
+				$value['ascii'] = false;
 			}

 			$data[ $field ] = $value;
@@ -1832,10 +1798,7 @@ class wpdb {
 		}

 		$charsets = $columns = array();
-
-		$table_parts = explode( '.', $table );
-		$table = '`' . implode( '`.`', $table_parts ) . '`';
-		$results = $this->get_results( "SHOW FULL COLUMNS FROM $table" );
+		$results = $this->get_results( "SHOW FULL COLUMNS FROM `$table`" );
 		if ( ! $results ) {
 			return new WP_Error( 'wpdb_get_table_charset_failure' );
 		}
@@ -1958,99 +1921,6 @@ class wpdb {
 		return $charset;
 	}

-	/**
-	 * Retrieve the maximum string length allowed in a given column.
-	 * The length may either be specified as a byte length or a character length.
-	 *
-	 * @since 4.2.1
-	 * @access public
-	 *
-	 * @param string $table  Table name.
-	 * @param string $column Column name.
-	 * @return mixed array( 'length' => (int), 'type' => 'byte' | 'char' )
-	 *               false if the column has no length (for example, numeric column)
-	 *               WP_Error object if there was an error.
-	 */
-	public function get_col_length( $table, $column ) {
-		$tablekey = strtolower( $table );
-		$columnkey = strtolower( $column );
-
-		// Skip this entirely if this isn't a MySQL database.
-		if ( false === $this->is_mysql ) {
-			return false;
-		}
-
-		if ( empty( $this->col_meta[ $tablekey ] ) ) {
-			// This primes column information for us.
-			$table_charset = $this->get_table_charset( $table );
-			if ( is_wp_error( $table_charset ) ) {
-				return $table_charset;
-			}
-		}
-
-		if ( empty( $this->col_meta[ $tablekey ][ $columnkey ] ) ) {
-			return false;
-		}
-
-		$typeinfo = explode( '(', $this->col_meta[ $tablekey ][ $columnkey ]->Type );
-
-		$type = strtolower( $typeinfo[0] );
-		if ( ! empty( $typeinfo[1] ) ) {
-			$length = trim( $typeinfo[1], ')' );
-		} else {
-			$length = false;
-		}
-
-		switch( $type ) {
-			case 'char':
-			case 'varchar':
-				return array(
-					'type'   => 'char',
-					'length' => (int) $length,
-				);
-				break;
-			case 'binary':
-			case 'varbinary':
-				return array(
-					'type'   => 'byte',
-					'length' => (int) $length,
-				);
-				break;
-			case 'tinyblob':
-			case 'tinytext':
-				return array(
-					'type'   => 'byte',
-					'length' => 255,        // 2^8 - 1
-				);
-				break;
-			case 'blob':
-			case 'text':
-				return array(
-					'type'   => 'byte',
-					'length' => 65535,      // 2^16 - 1
-				);
-				break;
-			case 'mediumblob':
-			case 'mediumtext':
-				return array(
-					'type'   => 'byte',
-					'length' => 16777215,   // 2^24 - 1
-				);
-				break;
-			case 'longblob':
-			case 'longtext':
-				return array(
-					'type'   => 'byte',
-					'length' => 4294967295, // 2^32 - 1
-				);
-				break;
-			default:
-				return false;
-		}
-
-		return false;
-	}
-
 	/**
 	 * Check if a string is ASCII.
 	 *
@@ -2091,7 +1961,7 @@ class wpdb {

 		// We don't need to check the collation for queries that don't read data.
 		$query = ltrim( $query, "\r\n\t (" );
-		if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $query ) ) {
+		if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN)\s/i', $query ) ) {
 			return true;
 		}

@@ -2149,55 +2019,50 @@ class wpdb {
 	 */
 		// If any of the columns don't have one of these collations, it needs more sanity checking.
 	protected function strip_invalid_text( $data ) {
+		// Some multibyte character sets that we can check in PHP.
+		$mb_charsets = array(
+			'ascii'   => 'ASCII',
+			'big5'    => 'BIG-5',
+			'eucjpms' => 'eucJP-win',
+			'gb2312'  => 'EUC-CN',
+			'ujis'    => 'EUC-JP',
+			'utf32'   => 'UTF-32',
+		);
+
+		$supported_charsets = array();
+		if ( function_exists( 'mb_list_encodings' ) ) {
+			$supported_charsets = mb_list_encodings();
+		}
+
 		$db_check_string = false;

 		foreach ( $data as &$value ) {
 			$charset = $value['charset'];

-			if ( is_array( $value['length'] ) ) {
-				$length = $value['length']['length'];
-			} else {
-				$length = false;
-			}
-
-			// There's no charset to work with.
-			if ( false === $charset ) {
+			// Column isn't a string, or is latin1, which will will happily store anything.
+			if ( false === $charset || 'latin1' === $charset ) {
 				continue;
 			}

-			// Column isn't a string.
 			if ( ! is_string( $value['value'] ) ) {
 				continue;
 			}

-			$truncate_by_byte_length = 'byte' === $value['length']['type'];
-
-			$needs_validation = true;
-			if (
-				// latin1 can store any byte sequence
-				'latin1' === $charset
-			||
-				// ASCII is always OK.
-				( ! isset( $value['ascii'] ) && $this->check_ascii( $value['value'] ) )
-			) {
-				$truncate_by_byte_length = true;
-				$needs_validation = false;
+			// ASCII is always OK.
+			if ( ! isset( $value['ascii'] ) && $this->check_ascii( $value['value'] ) ) {
+				continue;
 			}

-			if ( $truncate_by_byte_length ) {
-				mbstring_binary_safe_encoding();
-				if ( false !== $length && strlen( $value['value'] ) > $length ) {
-					$value['value'] = substr( $value['value'], 0, $length );
-				}
-				reset_mbstring_encoding();
-
-				if ( ! $needs_validation ) {
+			// Convert the text locally.
+			if ( $supported_charsets ) {
+				if ( isset( $mb_charsets[ $charset ] ) && in_array( $mb_charsets[ $charset ], $supported_charsets ) ) {
+					$value['value'] = mb_convert_encoding( $value['value'], $mb_charsets[ $charset ], $mb_charsets[ $charset ] );
 					continue;
 				}
 			}

 			// utf8 can be handled by regex, which is a bunch faster than a DB lookup.
-			if ( ( 'utf8' === $charset || 'utf8mb3' === $charset || 'utf8mb4' === $charset ) && function_exists( 'mb_strlen' ) ) {
+			if ( 'utf8' === $charset || 'utf8mb3' === $charset || 'utf8mb4' === $charset ) {
 				$regex = '/
 					(
 						(?: [\x00-\x7F]                  # single-byte sequences   0xxxxxxx
@@ -2207,7 +2072,7 @@ class wpdb {
 						|   \xED[\x80-\x9F][\x80-\xBF]
 						|   [\xEE-\xEF][\x80-\xBF]{2}';

-				if ( 'utf8mb4' === $charset ) {
+				if ( 'utf8mb4' === $charset) {
 					$regex .= '
 						|    \xF0[\x90-\xBF][\x80-\xBF]{2} # four-byte sequences   11110xxx 10xxxxxx * 3
 						|    [\xF1-\xF3][\x80-\xBF]{3}
@@ -2215,16 +2080,11 @@ class wpdb {
 					';
 				}

-				$regex .= '){1,40}                          # ...one or more times
+				$regex .= '){1,50}                          # ...one or more times
 					)
 					| .                                  # anything else
 					/x';
 				$value['value'] = preg_replace( $regex, '$1', $value['value'] );
-
-
-				if ( false !== $length && mb_strlen( $value['value'], 'UTF-8' ) > $length ) {
-					$value['value'] = mb_substr( $value['value'], 0, $length, 'UTF-8' );
-				}
 				continue;
 			}

@@ -2241,15 +2101,8 @@ class wpdb {
 						$queries[ $value['charset'] ] = array();
 					}

-					// We're going to need to truncate by characters or bytes, depending on the length value we have.
-					if ( 'byte' === $value['length']['type'] ) {
-						// Split the CONVERT() calls by charset, so we can make sure the connection is right
-						$queries[ $value['charset'] ][ $col ] = $this->prepare( "CONVERT( LEFT( CONVERT( %s USING binary ), %d ) USING {$value['charset']} )", $value['value'], $value['length']['length'] );
-					} else {
-						$queries[ $value['charset'] ][ $col ] = $this->prepare( "LEFT( CONVERT( %s USING {$value['charset']} ), %d )", $value['value'], $value['length']['length'] );
-					}
-
-					unset( $data[ $col ]['db'] );
+					// Split the CONVERT() calls by charset, so we can make sure the connection is right
+					$queries[ $value['charset'] ][ $col ] = $this->prepare( "CONVERT( %s USING {$value['charset']} )", $value['value'] );
 				}
 			}

@@ -2267,19 +2120,16 @@ class wpdb {

 				$this->check_current_query = false;

-				$sql = array();
-				foreach ( $query as $column => $column_query ) {
-					$sql[] = $column_query . " AS x_$column";
-				}
-
-				$row = $this->get_row( "SELECT " . implode( ', ', $sql ), ARRAY_A );
+				$row = $this->get_row( "SELECT " . implode( ', ', $query ), ARRAY_N );
 				if ( ! $row ) {
 					$this->set_charset( $this->dbh, $connection_charset );
 					return new WP_Error( 'wpdb_strip_invalid_text_failure' );
 				}

-				foreach ( array_keys( $query ) as $column ) {
-					$data[ $column ]['value'] = $row["x_$column"];
+				$cols = array_keys( $query );
+				$col_count = count( $cols );
+				for ( $ii = 0; $ii < $col_count; $ii++ ) {
+					$data[ $cols[ $ii ] ]['value'] = $row[ $ii ];
 				}
 			}

@@ -2302,12 +2152,6 @@ class wpdb {
 	 * @return string|WP_Error The converted query, or a {@see WP_Error} object if the conversion fails.
 	 */
 	protected function strip_invalid_text_from_query( $query ) {
-		// We don't need to check the collation for queries that don't read data.
-		$trimmed_query = ltrim( $query, "\r\n\t (" );
-		if ( preg_match( '/^(?:SHOW|DESCRIBE|DESC|EXPLAIN|CREATE)\s/i', $trimmed_query ) ) {
-			return $query;
-		}
-
 		$table = $this->get_table_from_query( $query );
 		if ( $table ) {
 			$charset = $this->get_table_charset( $table );
@@ -2327,7 +2171,6 @@ class wpdb {
 			'value'   => $query,
 			'charset' => $charset,
 			'ascii'   => false,
-			'length'  => false,
 		);

 		$data = $this->strip_invalid_text( array( $data ) );
@@ -2350,7 +2193,7 @@ class wpdb {
 	 * @return string|WP_Error The converted string, or a `WP_Error` object if the conversion fails.
 	 */
 	public function strip_invalid_text_for_column( $table, $column, $value ) {
-		if ( ! is_string( $value ) ) {
+		if ( ! is_string( $value ) || $this->check_ascii( $value ) ) {
 			return $value;
 		}

@@ -2367,7 +2210,7 @@ class wpdb {
 			$column => array(
 				'value'   => $value,
 				'charset' => $charset,
-				'length'  => $this->get_col_length( $table, $column ),
+				'ascii'   => false,
 			)
 		);

@@ -2408,16 +2251,16 @@ class wpdb {
 				. '|REPLACE(?:\s+LOW_PRIORITY|\s+DELAYED)?(?:\s+INTO)?'
 				. '|UPDATE(?:\s+LOW_PRIORITY)?(?:\s+IGNORE)?'
 				. '|DELETE(?:\s+LOW_PRIORITY|\s+QUICK|\s+IGNORE)*(?:\s+FROM)?'
-				. ')\s+((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)/is', $query, $maybe ) ) {
-			return str_replace( '`', '', $maybe[1] );
+				. ')\s+`?([\w-]+)`?/is', $query, $maybe ) ) {
+			return $maybe[1];
 		}

 		// SHOW TABLE STATUS and SHOW TABLES
 		if ( preg_match( '/^\s*(?:'
 				. 'SHOW\s+TABLE\s+STATUS.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)'
 				. '|SHOW\s+(?:FULL\s+)?TABLES.+(?:LIKE\s+|WHERE\s+Name\s*=\s*)'
-				. ')\W((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)\W/is', $query, $maybe ) ) {
-			return str_replace( '`', '', $maybe[1] );
+				. ')\W([\w-]+)\W/is', $query, $maybe ) ) {
+			return $maybe[1];
 		}

 		// Big pattern for the rest of the table-related queries.
@@ -2435,8 +2278,8 @@ class wpdb {
 				. '|LOAD\s+DATA.*INFILE.*INTO\s+TABLE'
 				. '|(?:GRANT|REVOKE).*ON\s+TABLE'
 				. '|SHOW\s+(?:.*FROM|.*TABLE)'
-				. ')\s+\(*\s*((?:[0-9a-zA-Z$_.`-]|[\xC2-\xDF][\x80-\xBF])+)\s*\)*/is', $query, $maybe ) ) {
-			return str_replace( '`', '', $maybe[1] );
+				. ')\s+\(*\s*`?([\w-]+)`?\s*\)*/is', $query, $maybe ) ) {
+			return $maybe[1];
 		}

 		return false;
--- a/wp-mail.php
+++ b/wp-mail.php
@@ -14,12 +14,6 @@ require(dirname(__FILE__) . '/wp-load.php');
 if ( ! apply_filters( 'enable_post_by_email_configuration', true ) )
 	wp_die( __( 'This action has been disabled by the administrator.' ) );

-$mailserver_url = get_option( 'mailserver_url' );
-
-if ( 'mail.example.com' === $mailserver_url || empty( $mailserver_url ) ) {
-	wp_die( __( 'This action has been disabled by the administrator.' ), 403 );
-}
-
 /**
 * Fires to allow a plugin to do a complete takeover of Post by Email.
 *