Ticket #7242: 7242.diff

wp-includes/media.php

@@ -73 +73 @@
         }
         elseif ( $size == 'thumbnail' ) {
                 // fall back to the old thumbnail
-                if ( $thumb_file = wp_get_attachment_thumb_file() && $info = getimagesize($thumb_file) ) {
+                if ( ($thumb_file = wp_get_attachment_thumb_file($id)) && $info = getimagesize($thumb_file) ) {
                         $img_url = str_replace(basename($img_url), basename($thumb_file), $img_url);
                         $width = $info[0];
                         $height = $info[1];