Index: wp-includes/class-oembed.php
===================================================================
--- wp-includes/class-oembed.php	(revision 21356)
+++ wp-includes/class-oembed.php	(working copy)
@@ -236,22 +236,20 @@
 			case 'photo':
 				if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) )
 					break;
-				if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) )
-					break;
 
-				$title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
-				$return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( $data->url ) . '" alt="' . esc_attr($title) . '" width="' . esc_attr($data->width) . '" height="' . esc_attr($data->height) . '" /></a>';
+				$title = ! empty( $data->title ) ? (string) $data->title : '';
+				$return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( (string) $data->url ) . '" alt="' . esc_attr( $title ) . '" width="' . esc_attr( (int) $data->width ) . '" height="' . esc_attr( (int) $data->height ) . '" /></a>';
 				break;
 
 			case 'video':
 			case 'rich':
-				if ( ! empty( $data->html ) && is_string( $data->html ) )
-					$return = $data->html;
+				if ( ! empty( $data->html ) )
+					$return = (string) $data->html;
 				break;
 
 			case 'link':
-				if ( ! empty( $data->title ) && is_string( $data->title ) )
-					$return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
+				if ( ! empty( $data->title ) )
+					$return = '<a href="' . esc_url( $url ) . '">' . esc_html( (string) $data->title ) . '</a>';
 				break;
 
 			default: