Forum is "quirky", but not "buggy", like a late SW 'Mech after a few too many battles. Click the tab at the bottom, in the center, which says "Forum Options", then choose the button on the right marked "Set Options". That will display an older forum that's been marked as inactive. Unfortunately, every time you go to another screen in that sub-forum, or back to the first screen, you'll have to go through that same procedure. Not intuitive, but at least it works.
No, the old HBS forums