--- dhtml_menu/dhtml_menu.module.orig	2009-10-10 18:05:18.000000000 -0700
+++ dhtml_menu/dhtml_menu.module	2009-10-10 18:06:25.000000000 -0700
@@ -180,7 +180,7 @@
     $tree = $tree[$key]['below'];
   }
   $key = $index[$item['mlid']]['key'];
-  return isset($tree[$key]) ? $tree[$key]['below'] : array();
+  return is_array($tree[$key]['below']) ? $tree[$key]['below'] : array();
 }
 
 /**