Since the last major refresh, I've noticed that the site doesn't reliably remember which threads I've read before or not.
I've checked the upper-right corner of the screen and can confirm that it does think I'm logged in. Going to one of the forums, though, it doesn't always remember which threads I've read and thus it doesn't show the ones w/unread messages in green.
Anyone else seeing this behaviour?
SOLUTION (worked for me at least): Sign out, then sign back in again
Post edited by bleargh : Adding note about what appears to be a solution to the problem I had