Something odd is going on. If for some reason you can't read topics (it returns a blank screen or Cannot find server) try clicking
MARK ALL MESSAGES AS READ or
MARK READ. This workaround seems to do the trick until you try to view the topic again.
This only happens when logged in. My guess is that there's a bug somewhere so something to do with pageviews doesn't get updated correctly and well.. things go wrong.
I hope to find a quick solution. Sorry for the inconvenience.
edit:
this doesn't happen all the time..
