The 'mark all read' botton in the main forum does not work. It gives the green box confermation but the threads are not marked as read. The same function works in all the individual forums.
There's a little cache issue on the site, but it does tend to go away after a while. (Gotta love Drupal!) Since we're moving to another site, hopefully soon, we've decided to focus our efforts on getting that one up and running.
No it is sadly all of them not updating. As I wrote it is just in the Main Forum it happens to me. If I enter one of the other forums (e.g. Barefoot & Minimalist Running) 'mark all read' works just fine.
Edit: I just noticed it is the same for 'Chapter forums'
I'll have Matt look at it again. We haven't had but one other complaint a while back, so I don't know what more we can do. Did you clear all your cache on your computer?