? menu_translate.patch
Index: includes/menu.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/menu.inc,v
retrieving revision 1.431
diff -u -p -r1.431 menu.inc
--- includes/menu.inc	4 Jan 2011 06:20:30 -0000	1.431
+++ includes/menu.inc	14 Feb 2011 18:49:39 -0000
@@ -766,9 +766,12 @@ function _menu_translate(&$router_item, 
       $tab_parent_map[$i] = $path_map[$i];
     }
   }
-  $router_item['href'] = implode('/', $link_map);
-  $router_item['tab_root_href'] = implode('/', $tab_root_map);
-  $router_item['tab_parent_href'] = implode('/', $tab_parent_map);
+  if(isset($link_map))
+    $router_item['href'] = implode('/', $link_map);
+  if(isset($tab_root_map))
+    $router_item['tab_root_href'] = implode('/', $tab_root_map);
+  if(isset($tab_parent_map))
+    $router_item['tab_parent_href'] = implode('/', $tab_parent_map);
   $router_item['options'] = array();
   _menu_check_access($router_item, $map);