--- a/web/wp-admin/upload.php	Wed Dec 19 12:35:13 2012 -0800
+++ b/web/wp-admin/upload.php	Wed Dec 19 17:46:52 2012 -0800
@@ -57,7 +57,7 @@
 			if ( !$parent_id )
 				return;
 
-			$parent = &get_post( $parent_id );
+			$parent = get_post( $parent_id );
 			if ( !current_user_can( 'edit_post', $parent_id ) )
 				wp_die( __( 'You are not allowed to edit this post.' ) );
 
@@ -69,12 +69,14 @@
 					continue;
 
 				$attach[] = $att_id;
-				clean_attachment_cache( $att_id );
 			}
 
 			if ( ! empty( $attach ) ) {
-				$attach = implode( ',', $attach );
-				$attached = $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_parent = %d WHERE post_type = 'attachment' AND ID IN ( $attach )", $parent_id ) );
+				$attach_string = implode( ',', $attach );
+				$attached = $wpdb->query( $wpdb->prepare( "UPDATE $wpdb->posts SET post_parent = %d WHERE post_type = 'attachment' AND ID IN ( $attach_string )", $parent_id ) );
+				foreach ( $attach as $att_id ) {
+					clean_attachment_cache( $att_id );
+				}
 			}
 
 			if ( isset( $attached ) ) {