It's screwing with the "new" tags next to the subjects though. If you view a message and then go to the list without a new message being posted - it's still marked "new", even though you've just read it.
Also, I had to remove some of the cache settings because they were making it so that any updates were lost (on the non-forum areas of the site).
All in all, this caching business needs some tweaking, so if things seems strange around here, just ignore it for a little while, I'm working on it.
simon