--- a/sites/all/modules/contrib/menu_breadcrumb/menu_breadcrumb.module
+++ b/sites/all/modules/contrib/menu_breadcrumb/menu_breadcrumb.module
@@ -300,6 +300,7 @@ function menu_breadcrumb_menu_list() {
  * Set the active menu according to the current path.
  */
 function menu_breadcrumb_init() {
+  if(request_uri() == '/admin/build/block') return;
   if (variable_get('menu_breadcrumb_determine_menu', 1)) {
     // Find the set of menus containing a link for the current page.
     $menu_item = menu_get_item();