Well, I was logged in at the time, and there were about 10 threads on New Posts before that happened. I am confuzzled.
You probably were inactive for 15 minutes, though. If a user is inactive for 15 minutes, they get logged out (timed out). If they have "Remember me?" checked, then cookies log them back in the next time they click somewhere.
No. I had just gotten out of a thread (when there were about 10 of them on New Posts). So I was on New Posts. I clicked New Posts to refresh the New Posts page. And that was the message I got (see first post). In other words, what equation do you get when you solve a -- q = a + sx for x? لماذا أنت بهذا الغباء؟