Index: modules/menu/menu.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/menu/menu.admin.inc,v
retrieving revision 1.48
diff -u -p -r1.48 menu.admin.inc
--- modules/menu/menu.admin.inc	24 May 2009 17:39:32 -0000	1.48
+++ modules/menu/menu.admin.inc	3 Jun 2009 03:41:30 -0000
@@ -74,7 +74,7 @@ function menu_overview_form(&$form_state
  * Recursive helper function for menu_overview_form().
  */
 function _menu_overview_tree_form($tree) {
-  static $form = array('#tree' => TRUE);
+  $form = &drupal_static(__FUNCTION__, array('#tree' => TRUE));
   foreach ($tree as $data) {
     $title = '';
     $item = $data['link'];