TC that's weird very weird.
Token errors should only happen on the front end of the site and not the forums.
When you say you have speed issues, what sort of timeframes are we talking? The site and forums load in under 7 seconds fir me, which is the industry standard.
Timeouts are very odd too as there should be no real timeout though it depends we may be talking about very long periods.
Make sure when you login you check the box for it to remember your login then that way it should set a permanent cookie. Rather than the 1hr session.
Also what version of Firefox are you using?