Game crashes against ISIC in the first mission at the end

Played through the whole mission without problems. When i’m facing ISIC, after shooting his third leg, the screen freezes, the sound continue a bit, and then the game crashes and i am at windows.
I searched for the problem, and it seems more had it in the beta.

Another crash also found place as soon as i joined a multiplayer match, and “FATAL ERROR” came on the screen.
I’ve got the logs and dxdiag but i’m unable to upload it here.