Index: modules/system/system.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.module,v
retrieving revision 1.918
diff -u -p -r1.918 system.module
--- modules/system/system.module	7 Apr 2010 16:35:03 -0000	1.918
+++ modules/system/system.module	7 Apr 2010 17:58:58 -0000
@@ -1013,6 +1013,9 @@ function system_menu() {
     'access arguments' => array('administer site configuration'),
     'type' => MENU_CALLBACK,
     'file' => 'system.admin.inc',
+    // Override admin theme, so this link works same as cron.php.
+    'theme callback' => 'variable_get',
+    'theme arguments' => array('theme_default'),
   );
   $items['admin/reports/status/php'] = array(
     'title' => 'PHP',