I am experiencing this strange bug - it doesn't happen all the time , but when im logged out and try to press "Login" button, i am redirected to
http://forumserver.twoplustwo.com/ubbthreads.php?Cat=0 page for some reason. Such redirect scenario can last a day or two, then suddenly it finally starts to show login & password form, where i login and have fine time browsing a day or so, until it happens again. No problems of this sort in IE though.