Just as the title says. Threads aren't automatically being marked as read... I have to go in and manually "set forum to read" in order to make the threads appear as read. Any ideas? Maybe I'm missing a setting in the user control panel.

 

Happens here too. Using Firefox pretty much exclusively. If I close the window and reopen it all threads that were previously read will be unread again.

 

I've never noticed it before, it's a huge ****-off. If I click "quick links" at the top that's a quick way to mark all forums read.

 

Try logging out and back in. That will remove the site cookie and cache files. Sometimes a cookie/cache file can get corrupt and cause odd issues.