Today when i visit http://www.undergroundnews.com
i tried to click on the WebBoard link in the left, but the link was: http://www.undergroundnews.com/../cgi-bin/ubbcgi/ultimatebb.cgi
you see that /../ before the cgi directory, i click on it but it was displaying a 404 error, then i removed those two dots and typed: http://www.undergroundnews.com/cgi-bin/ubbcgi/ultimatebb.cgi
normally as it always was and it worked.
Now did you change the link on the home page intentionally or something happend ?