--- menu_breadcrumb_org.module	2008-02-20 19:56:34.000000000 +0100
+++ menu_breadcrumb.module	2008-11-06 11:39:52.000000000 +0100
@@ -77,12 +77,14 @@ function menu_breadcrumb_init() {
   if (variable_get('menu_breadcrumb_determine_menu', 1)) {
     $menu_item = menu_get_item();
     $menu_link = menu_link_load(db_result(db_query("SELECT mlid FROM {menu_links} WHERE link_path = '%s'", $menu_item['href'])));
-    $use_menu = $menu_link['menu_name'];
-    menu_set_active_menu_name($use_menu);
+    $use_menu = $menu_link['menu_name']; 
+    if($use_menu != "admin_menu") {
+      menu_set_active_menu_name($use_menu);
+    }
   }
 
   $breadcrumb = drupal_get_breadcrumb();
-  
+
   if (variable_get('menu_breadcrumb_append_node_title', 0) == 1) {
     if (variable_get('menu_breadcrumb_append_node_url', 0) == 1) {
       $breadcrumb[] = l(drupal_get_title(), $_GET['q']);