I'm on PC and am having a very odd issue with screen flickering. Everytime I look at an oblivion gate, or certain other shaders/screen effects (such as when I get hit and the red appears around the screen), the screen will quickly flicker between what my current screen should be, and a screenshot of just before my last load area. This effect happens for the entire time the oblivion gate is on the scren. I've never encountered this type of present/past screen flickering... has anybody else? Any ideas on what could be causing it?