Index: wp-includes/media.php
===================================================================
--- wp-includes/media.php	(revision 23974)
+++ wp-includes/media.php	(working copy)
@@ -2393,13 +2393,19 @@
 	$medias = get_attached_images( $post->ID );
 	if ( ! empty( $medias ) ) {
 		$media = reset( $medias );
-		$sizes = get_intermediate_image_sizes();
 
 		$urls = array();
-		foreach ( $sizes as $size ) {
+
+		// Add media permalink.
+		$urls[] = get_attachment_link( $media->ID );
+
+		// Add original image source.
+		$urls[] = reset( wp_get_attachment_image_src( $media->ID, 'original' ) );
+
+		// Add all possible image sizes.
+		$sizes = get_intermediate_image_sizes();
+		foreach ( $sizes as $size )
 			$urls[] = reset( wp_get_attachment_image_src( $media->ID, $size ) );
-			$urls[] = get_attachment_link( $media->ID );
-		}
 
 		$count = 1;
 		$matches = array();