Michael, sounds like maybe something's "wrong" with your connection. Mine's far from perfect, but it lasts at least 10-15 minutes - usually/with some exceptions. I've bookmarked the login page and saved the credentials in browser so (re-)logging in is faster. Are you going through some proxies or something, where some of your connection properties are constantly changing and are reacted to by the forum's software?
I dunno man.
But the whole thing has been tremendously annoying, ever since they changed this stuff...