diff --git a/wp-admin/js/set-post-thumbnail.dev.js b/wp-admin/js/set-post-thumbnail.dev.js
index 4362ef23b8..d331bd4a10 100644
--- a/wp-admin/js/set-post-thumbnail.dev.js
+++ b/wp-admin/js/set-post-thumbnail.dev.js
@@ -6,7 +6,6 @@ function WPSetAsThumbnail(id){
 		var win = window.dialogArguments || opener || parent || top;
 		if ( str == '0' ) {
 			alert( setPostThumbnailL10n.error );
-			win.cwsCloseTB();
 		} else {
 			jQuery('a.wp-post-thumbnail').text( setPostThumbnailL10n.setThumbnail );
 			jQuery('#media-item-' + id + ' > a.wp-post-thumbnail').hide();
diff --git a/wp-admin/js/set-post-thumbnail.js b/wp-admin/js/set-post-thumbnail.js
index fef9fb8f41..3967c8e994 100644
--- a/wp-admin/js/set-post-thumbnail.js
+++ b/wp-admin/js/set-post-thumbnail.js
@@ -1 +1 @@
-function WPSetAsThumbnail(id){jQuery("#media-item-"+id+" > a.wp-post-thumbnail").text(setPostThumbnailL10n.saving).attr("href","#");jQuery.post(ajaxurl,{action:"set-post-thumbnail",post_id:post_id,thumbnail_id:id,cookie:encodeURIComponent(document.cookie)},function(str){var win=window.dialogArguments||opener||parent||top;if(str=="0"){alert(setPostThumbnailL10n.error);win.cwsCloseTB()}else{jQuery("a.wp-post-thumbnail").text(setPostThumbnailL10n.setThumbnail);jQuery("#media-item-"+id+" > a.wp-post-thumbnail").hide();win.WPSetThumbnailID(id);win.WPSetThumbnailHTML(str)}})};
\ No newline at end of file
+function WPSetAsThumbnail(id){jQuery("#media-item-"+id+" > a.wp-post-thumbnail").text(setPostThumbnailL10n.saving).attr("href","#");jQuery.post(ajaxurl,{action:"set-post-thumbnail",post_id:post_id,thumbnail_id:id,cookie:encodeURIComponent(document.cookie)},function(str){var win=window.dialogArguments||opener||parent||top;if(str=="0"){alert(setPostThumbnailL10n.error)}else{jQuery("a.wp-post-thumbnail").text(setPostThumbnailL10n.setThumbnail);jQuery("#media-item-"+id+" > a.wp-post-thumbnail").hide();win.WPSetThumbnailID(id);win.WPSetThumbnailHTML(str)}})};
\ No newline at end of file
diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index ac68f3d92a..f1f14de2c3 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -375,7 +375,7 @@ function wp_default_scripts( &$scripts ) {
 		$scripts->add( 'image-edit', "/wp-admin/js/image-edit$suffix.js", array('jquery', 'json2', 'imgareaselect'), '20090929' );
 		$scripts->add_data( 'image-edit', 'group', 1 );
 
-		$scripts->add( 'set-post-thumbnail', "/wp-admin/js/set-post-thumbnail$suffix.js", array( 'jquery' ), '20091014' );
+		$scripts->add( 'set-post-thumbnail', "/wp-admin/js/set-post-thumbnail$suffix.js", array( 'jquery' ), '20091015' );
 		$scripts->add_data( 'set-post-thumbnail', 'group', 1 );
 		$scripts->localize( 'set-post-thumbnail', 'setPostThumbnailL10n', array(
 			'setThumbnail' => __( 'Use for thumbnail' ),