diff --git a/wp-admin/includes/nav-menu.php b/wp-admin/includes/nav-menu.php
index 38fc91a953..c11cda3d60 100644
--- a/wp-admin/includes/nav-menu.php
+++ b/wp-admin/includes/nav-menu.php
@@ -21,8 +21,8 @@ function wp_nav_menu_post_type_metaboxes() {
 	foreach ( $post_types as $post_type ) {
 		if ( !in_array($post_type->name, $allowed_types) )
 			continue;
-		$id = sanitize_title_with_dashes( $post_type->label );
-		
+		$id = $post_type->name;
+
 		// delete_transient( "nav_menu_items_{$post_type->name}" );
 		// delete_transient( "nav_menu_sub_items_{$post_type->name}" );
 		
@@ -37,7 +37,7 @@ function wp_nav_menu_post_type_metaboxes() {
  */
 function wp_nav_menu_taxonomy_metaboxes() {
 	$taxonomies = get_taxonomies( array( 'show_ui' => true ), 'object' );
-	
+
 	if ( !$taxonomies )
 		return false;
 
@@ -45,12 +45,11 @@ function wp_nav_menu_taxonomy_metaboxes() {
 	foreach ( $taxonomies as $tax ) {
 		if ( !in_array($tax->name, $allowed_types) )
 			continue;
-		$id = sanitize_title_with_dashes( $tax->label );
+		$id = $tax->name;
 
-		
 		// delete_transient( "nav_menu_items_{$tax->name}" );
 		// delete_transient( "nav_menu_sub_items_{$tax->name}" );
-		
+
 		add_meta_box( "add-{$id}", sprintf( __('Add an Existing %s'), $tax->singular_label ), 'wp_nav_menu_item_taxonomy_metabox', 'menus', 'side', 'default', $tax );
 	}
 }
@@ -182,7 +181,7 @@ function wp_nav_menu_item_post_type_metabox( $object, $post_type ) {
 		}
 	}
 	
-	$id = sanitize_title_with_dashes( $post_type['args']->label );
+	$id = $post_type['args']->name;
 	?>
 	<p class="quick-search-wrap">
 		<input type="text" class="quick-search regular-text" value="" />
@@ -197,14 +196,14 @@ function wp_nav_menu_item_post_type_metabox( $object, $post_type ) {
 	<div id="existing-<?php echo esc_attr( $id ); ?>" class="list-wrap">
 		<div class="list-container">
 			<ul class="list">
-				<?php echo isset( $error ) ? $error : wp_nav_menu_get_items( $query->posts, 'post_type', $post_type['args']->name ); ?>
+				<?php echo isset( $error ) ? $error : wp_nav_menu_get_items( $query->posts, 'post_type', $id ); ?>
 			</ul>
 		</div><!-- /.list-container-->
 	</div><!-- /#existing-categories-->
 	<p class="add-to-menu">
 		<a class="button-secondary"><?php _e('Add to Menu'); ?></a>
 	</p>
-	<input type="hidden" class="autocomplete" name="autocomplete-<?php echo esc_attr( $post_type['args']->name ); ?>-names" value="<?php echo esc_js( $pt_names ); ?>" />
+	<input type="hidden" class="autocomplete" name="autocomplete-<?php echo esc_attr( $id ); ?>-names" value="<?php echo esc_js( $pt_names ); ?>" />
 	<br class="clear" />
 	<script type="text/javascript" charset="utf-8">
 		// <![CDATA[
@@ -252,7 +251,7 @@ function wp_nav_menu_item_taxonomy_metabox( $object, $taxonomy ) {
 		}
 	}
 	
-	$id = sanitize_title_with_dashes( $taxonomy['args']->label );
+	$id = $taxonomy['args']->name;
 	?>
 	<p class="quick-search-wrap">
 		<input type="text" class="quick-search regular-text" value="" />
@@ -267,14 +266,14 @@ function wp_nav_menu_item_taxonomy_metabox( $object, $taxonomy ) {
 	<div id="existing-<?php echo esc_attr( $id ); ?>" class="list-wrap">
 		<div class="list-container">
 			<ul class="list">
-				<?php echo isset( $error ) ? $error : wp_nav_menu_get_items( $terms, 'taxonomy', $taxonomy['args']->name ); ?>
+				<?php echo isset( $error ) ? $error : wp_nav_menu_get_items( $terms, 'taxonomy', $id ); ?>
 			</ul>
 		</div><!-- /.list-container-->
 	</div><!-- /#existing-categories-->
 	<p class="add-to-menu">
 		<a class="button-secondary"><?php _e('Add to Menu'); ?></a>
 	</p>
-	<input type="hidden" class="autocomplete" name="autocomplete-<?php echo esc_attr($taxonomy['args']->name); ?>-names" value="<?php echo esc_js( $term_names ); ?>" />
+	<input type="hidden" class="autocomplete" name="autocomplete-<?php echo esc_attr($id); ?>-names" value="<?php echo esc_js( $term_names ); ?>" />
 	<br class="clear" />
 	<script type="text/javascript" charset="utf-8">
 		// <![CDATA[
diff --git a/wp-includes/nav-menu-template.php b/wp-includes/nav-menu-template.php
index 1492c6a488..f94e98e7e4 100644
--- a/wp-includes/nav-menu-template.php
+++ b/wp-includes/nav-menu-template.php
@@ -116,7 +116,7 @@ function wp_get_nav_menu( $args = array() ) {
 		// Setup the $menu_item variables
 		$menu_item = wp_setup_nav_menu_item( $menu_item, 'frontend' );
 
-		$type = sanitize_title_with_dashes( $menu_item->append );
+		$type = $menu_item->append;
 		$maybe_value = 'frontend' == $args->context ? '' : ' value="'. $menu_item->ID .'"';
 		$classes = 'frontend' == $args->context ? ' class="menu-item-type-'. $type . $menu_item->li_class .'"' : '';
 		
diff --git a/wp-includes/nav-menu.php b/wp-includes/nav-menu.php
index 017b44904d..7d017673b9 100644
--- a/wp-includes/nav-menu.php
+++ b/wp-includes/nav-menu.php
@@ -171,7 +171,8 @@ function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_
 			$menu_item->object_id = get_post_meta( $menu_item->ID, 'menu_item_object_id', true );
 			$menu_item->parent_id = (int) $menu_item->post_parent;
 			$menu_item->type = get_post_meta( $menu_item->ID, 'menu_item_type', true );
-			$menu_item->append = _x( get_post_meta( $menu_item->ID, 'menu_item_append', true ), 'nav menu item type' );
+
+			$menu_item->append = get_post_meta( $menu_item->ID, 'menu_item_append', true );
 			
 			$menu_item->title = $menu_item->post_title;
 			$menu_item->url = get_post_meta( $menu_item->ID, 'menu_item_url', true );
@@ -190,7 +191,7 @@ function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_
 			$menu_item->object_id = (int) $menu_item->ID;
 			$menu_item->parent_id = (int) $menu_item->post_parent;
 			$menu_item->type = 'custom'; //$menu_item_type
-			$menu_item->append = _x( 'Custom', 'nav menu item type' );
+			$menu_item->append = 'custom';
 			
 			$menu_item->attr_title = strip_tags( $menu_item->post_excerpt );
 			$menu_item->description = strip_tags( $menu_item->post_content );
@@ -207,7 +208,7 @@ function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_
 			$menu_item->type = $menu_item_type;
 			
 			$object = get_post_type_object( $menu_item_object );
-			$menu_item->append = _x( $object->singular_label, 'nav menu item type' );
+			$menu_item->append = $object->name;
 
 			$menu_item->title = $menu_item->post_title;
 			$menu_item->url = get_permalink( $menu_item->ID );
@@ -225,7 +226,7 @@ function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_
 			$menu_item->type = $menu_item_type;
 			
 			$object = get_taxonomy( $menu_item_object );
-			$menu_item->append = _x( $object->singular_label, 'nav menu item type' );
+			$menu_item->append = $object->name;
 
 			$menu_item->title = $menu_item->name;
 			$menu_item->url = get_term_link( $menu_item, $menu_item_object );
@@ -234,7 +235,7 @@ function wp_setup_nav_menu_item( $menu_item, $menu_item_type = null, $menu_item_
 			$menu_item->description = strip_tags( $menu_item->description );
 			break;
 	}
-	
+
 	$menu_item->classes = get_post_meta( $menu_item->ID, 'menu_item_classes', true );
 	$menu_item->xfn = get_post_meta( $menu_item->ID, 'menu_item_xfn', true );