Are private messages working for other people? I've tried to send three recently that I don't think have been sent. When I send them, I get sent to message/compose and it's blank, and when I check message/sent they aren't there. I'm on a different, dodgier internet connection than normal, and so the problem could very well be on my end.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.