Unfortunatly I just get:
session_start() [function.session-start]: Cannot send session cache limiter - headers already sent
I thought this was due to spaces after/before the PHP tags but I can't see any.
My forum.php is just 7 lines including everything:
<?php $title = "Forum"; $sideplans = "no"; include('inc/header.php'); include('forum/index.php'); include('inc/footer.php'); ?>