I founded maybe biggest bug in history php-fusion!

<?php
/*-------------------------------------------------------+
| PHPFusion Content Management System
| Copyright (C) 2002 - 2008 Nick Jones
| http://www.php-fusion.co.uk/
+--------------------------------------------------------+
| Original filename: index.php
| Original author: Nick Jones (Digitanium)
| current filename: index.php
| file edited by: DubSev
| +++++
| changes:
| Added code. When index.php has been set as opening page
| an error message will appear which will tell to change
| opening page.
+--------------------------------------------------------+
| This program is released as free software under the
| Affero GPL license. You can redistribute it and/or
| modify it under the terms of this license which you
| can read by viewing the included agpl.txt or online
| at www.gnu.org/licenses/agpl.html. Removal of this
| copyright header is strictly prohibited without
| written permission from the original author(s).
+--------------------------------------------------------*/
require_once "maincore.php";

if ($settings['opening_page'] == 'index.php') { die("Oops! It seems like the webmaster set index.php as the startpage.
If you are the webmaster, please go to www.yoursite.com/login.php, login if needed, go to your admin panel and use another opening page.") ;} 
else {redirect($settings['opening_page']);}

?>