Something is seriously wrong with the last patch. I played/attempted to play several game Saturday. I had 4 unhandled exceptions and lockups (2 requiring reboot) in 7 games. I haven't seen that kind of problems for a while now. I had 2 lockups playing '/serverproxyonly' , and 2 without the proxy switch. I don't think the problems were connection related.
The overlay is great, but something got screwed up in the process. It needs to be fixed.