Guys I tried the fix that was posted above: Go into graphics options-> scroll to bottom and click on troubleshooting--> the first item on the list will show your graphics card -> SELECT your graphics card with the "DX11beta" next to it's description. Then hit "apply" and restart game!
This stopped all of the screen corruption and artifacts for me...besides that, the game looks a little better now and I didn't have to roll back anything.
I am glad you were able to use the DX 11b.I am still not able too.The only way I was able too get rid of the artifacts was too disable anti-aliasing and lower the shadows.When I set DX 11b the mouse is was off target and the screen shrinks.
The screenshots posted earlier mirror my exact situation. I'm using an AMD Radeon card, too, and it updated its drivers tonight, along with the STO patch. I didn't know what happened at first; I assumed driver problems and reinstalled them. Still nothing. Then I looked at some of my other programs, which run fine. Finally I ended up here, and I tried turning off anti-aliasing. Worked like a charm; no problems now. Still, I hope this is something that can be fixed, as I'd hate to just leave AA off forever.