It looks like the new code at the bottom of /CSSMenuWriter/cssmw_admin/menu.php is causing the problem.
<?php
$WA_Menu->Initialize(true);
echo($WA_Menu->Body);
?>
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.