Index: modules/menu/menu.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/menu/menu.module,v
retrieving revision 1.100.2.2
diff -u -p -r1.100.2.2 menu.module
--- modules/menu/menu.module	7 Jan 2008 02:13:58 -0000	1.100.2.2
+++ modules/menu/menu.module	30 Oct 2008 03:42:00 -0000
@@ -357,6 +357,7 @@ function menu_edit_item_form($type, $mid
     '#title' => t('Description'),
     '#default_value' => $item['description'],
     '#description' => t('The description displayed when hovering over a menu item.'),
+    '#maxlength' => 255,
   );
 
   if ($item['type'] & MENU_CREATED_BY_ADMIN) {