Open GL, as far as I know, defines a certain standard of real time in 3D graphics. It's an open technology used by graphics card manufacturers, in the form of graphics hardware acceleration. I think what it mostly is supposed to do is to make previews look better, faster. It won't affect your actual renders, though since it's more of a "real-time" feature. I think it weas designed for games, more than 3D CG. Anyhow, Vue has a problem dealing with Open GL when used with certain graphics cards. The only thing you can do for now, is to disable the Open GL previews, and then everything should be OK. you'll have to deal with "wireframe" in yourd viewports, but, some of us with no problems, do so anyway. Open GL looks nifty, but it doesn't add enough for the trouble it can cause, IMHO; Even on a system which has no trouble with it, enabling it will still invariably slow the interface. And since it contributes nothing to the final render, I personally believe it's best to do without it, unless you have dual 1.5 ghz cpu's.......