Sup - it seems the collapse state of the sidebar isn't stored and from what I see it might be a cookie problem. Getting:
Set as cookies while being logged in - think there's something wrong with the domain (either in PHP or VB) so cookies should belong to gpsunderground.com without the point.
Guess this should fix the sitebar problem.
Oh - and you may also disable "session.auto_start" in your php.ini - that PHPSESSID cookie if not used otherwise isn't required.