The logging in problem only affects me with Firefox - it won't accept my username and password at all now - but I don't have any problems with Internet Explorer. Has Campbell cut a deal with Microsoft by any chance?
Cookies should work ok with www.adrift.co/forum. Not sure why problem exists with forum.adrift.co at the mo. Agree unread post icons need to be more obvious tho, altho you can always change your forum style.