I played tf2 this afternoon, like the last 3 month on Ubuntu 12.04 I had no problem. I saw there was an update at 18h52. Now the game crash while still in the splash screen: I dont get to the menus. I updated to the experimental nvidia driver like Steam is recommended. I also followed the advices on this page:
Black screen on tf2 on ubuntu 12.04
I can't find a way to get back into the game...