That's the error message I get when I try to subscribe to one of my old threads (which I thought I was still subscribed to). I linked to it and wanted to re-subscribe so if someone posts on it, I'd be notified. Any ideas? It's the Trapped a Dog on my Deck, Got an Earful thread from 2010 I started. ETA: It won't let me susbscribe to this one, either. ETA: Just now tried to do it from the profile page and it worked, but didn't on the actual thread.