I've been trying to fix this issue for ages now, the brush in cs6 is laggy and lags behind my cursor when I try to paint. This happened on my old pc, and also on my new one that I just built. Also when I move the canvas around in full screen mode there's tons of screen tearing, it basically looks like photoshop is running at 10fps or something. cs5 is fine, anyone know what might be causing this?