Logging in & out just fine here, using Firefox. As do some others report above.
I'm guessing you guys need to look into some stuff you're blocking. But which stuff... hmmm. It doesn't seem to add up that you can log in, but not out; you'd think it'd be the same script/cookies/whatever.
strange that i tried to enter /login to the url then arrived at a page and noticed nothing is logged in so i entered some other account but ended up in this the same account and still cant logout.