1 - Update your drivers (if possible). Some of the problems are related to drivers - see the patch notes.
2 - Reduce your graphics settings to low and see if it fixes the problems. I had a myriad of problems on high but now am able to play on low (not that I like it as much, but it works).
3 - Clear out your cache (under USER/Shaders) and remove any tweaks (if any)
Be sure to open a ticket or post to the support or patch notes forum, and include your machine specs including the type of card you use, the driver version, and the OS. I also recommend telling them what level of graphics you are using (low, medium, high, custom). We need to help PGI get these issues resolved (so I can play on 'high' again

Edited by Tallan, 03 April 2013 - 04:29 AM.