Index: modules/user/user.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.admin.inc,v
retrieving revision 1.17
diff -u -p -r1.17 user.admin.inc
--- modules/user/user.admin.inc	10 Jan 2008 21:42:59 -0000	1.17
+++ modules/user/user.admin.inc	15 Jan 2008 21:06:29 -0000
@@ -13,7 +13,10 @@ function user_admin($callback_arg = '') 
     case 'search':
     case t('Search'):
       $keys = isset($_POST['keys']) ? $_POST['keys'] : NULL;
-      $output = drupal_get_form('search_form', url('admin/user/search'), $keys, 'user') . search_data($keys, 'user');
+      $output = drupal_get_form('search_form', NULL, $keys, 'user');
+      if ($keys != NULL) {
+        $output .= search_data($keys, 'user');        
+      }
       break;
     case t('Create new account'):
     case 'create':