Not 100% sure but figure it is due to old files left on the server but if I go here:

http://www.hostboard.com/LDPforum/ubbthreads/login.php?Cat

Boom it goes.
What files can I safely remove from the ubbthreads/ directory or forums/ for those configured differently?

Seems some users saved this to their favorites and think the site is down...laff...