Seems like topics aren’t being flagged as having new posts like they used to. Any reason for that, am I just hallucinating?
I haven’t noticed it.
I think you are just hallucinating.
sometimes…rebooting the pc fixes it for a few days for me…
depends on which memory hogs we’ve been running, eh?
Do you know, we had this SAME, EXACT problem at the school where I teach.
Darned if I can remember what the answer was, though. 
You’re not alone!
Be sure cookies are turned on, clear your cookie file and cache files… refresh the screen, logon again… See if that fixes it.