[Solved] I cannot log out.

I installed the latest (3.1.1) fresh.
I run Ubuntu Edgy Eft (my server is dreamhost)
Firefox 2.0.0.1 is my  (safe mode changed nothing)
I have master password set + remember on the check box

I cleared cache and I have not been able to logout for the last 5 min.

site - www.fanforge.net

I made another admin, he can't logout either. Here are his system specs:

win xp
firefox (2.0.0.1)
tried safe mode and he cleared cache. no change, still stuck

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update, if i restart my computer, i'll be logged out. friend surmises it to be a session problem server side

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edit - my assumption was incorrect. The code was infact wrong/incomplete so here is an update:

user/logout.php

<?php

// Generally, you should be able to leave this alone.  This logout function will unset all session variables and cookie variables of the same name that begin with the site's sitekey.
include("config.php");
session_start();

$_SESSION = array();
$_GET = array();
$_POST = array();

if (isset($_COOKIE[session_name()])) {
 setcookie(session_name(), '', time()-42000, '/');
}

session_destroy();

header('Location:  http://'.$_SERVER ['HTTP_HOST'].'/index.php');
exit( );
?>

if a fix is needed, feel free, but i logout over and over on multiple browsers and os's without issue now. All my users were stuck beforehand. I could log in and out on different script without issue too.