I'm not sure what the problem can be. I only get corruption if trying to use D3D11 (or just D3D in latest revs), but it's a very different kind of corruption than what you are getting, I posted a screenshot below. D3D9 in older revs and OpenGL should work fine, I'm using OpenGL in the latest rev. Nothing that I've tried can replicate your issue. Maybe its the graphics card driver but you may have already thought of that. I know there was an issue with one of the newer nvidia drivers that kept causing Dolphin to freeze on me, 332.21 is stable for me though. I haven't seen much on the issue so I'm not sure if it's your problem. Might need a dev on this one .
Whoops had the wrong screenshot linked. This correct.
Whoops had the wrong screenshot linked. This correct.