Of course it is not a driver issue. If something works, than a "patch" comes out and it no longer works, where may be the problem? But they can not simpy say sorry guys, we screwed up, it will be fixed in x days. No, the problem is on our side, we should reinstall drivers (and why not the whole system?) because they broke the game. And still no official word on when they will fix it or how can we roll back to a previous, perfectly playable version.