diff --git a/wp-includes/rest-api.php b/wp-includes/rest-api.php
index dc359aec50..988dd9c778 100644
--- a/wp-includes/rest-api.php
+++ b/wp-includes/rest-api.php
@@ -996,7 +996,7 @@ function rest_get_avatar_sizes() {
 function rest_validate_value_from_schema( $value, $args, $param = '' ) {
 	if ( 'array' === $args['type'] ) {
 		if ( ! is_array( $value ) ) {
-			return new WP_Error( 'rest_invalid_param', sprintf( /* translators: 1: parameter, 2: type name */ __( '%1$s is not of type %2$s.' ), $param, 'array' ) );
+			$value = preg_split( '/[\s,]+/', $value );
 		}
 		foreach ( $value as $index => $v ) {
 			$is_valid = rest_validate_value_from_schema( $v, $args['items'], $param . '[' . $index . ']' );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index b88dadb97f..6852e78015 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta1-39047';
+$wp_version = '4.7-beta1-39048';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.