ok gentlemen, i have this issue still, ive done some scans to clean the computer up and deleted cookies etc.... i have relogged in and it doesnt keep me logged in.
For example i can see my personal details where it shows your last visit, welcome, msg box etc on the right top corner of the page as if im logged in, then when i go to post i click post i have to log in, then when i go to send it i have relogin again, its as if im sublogged in.