Now here's a switch. A thread I've posted to and which always showed up in "My Flyertalk" suddenly stopped. I'm sure I didn't unsubscribe because I hadn't been in FT in a few days, and today when I went to check, it had no new posts and it didn't show up on my list.

I think I may have gone in via the iphone app for a few minutes, but I don't even think there's an unsubscribe button there.

I can't say this has ever happened before.