I'm having an issue with my preview object window, the actual object is display three times in a sort of mosaic. Can't post a link to the screenshot for some reason :/. The render window is fine.
It's not a tool-crashing bug but it's still an annoying graphic glitch. There's a regular size render of the object, then on it is overlayed a smaller-sized render and then on top of that one, another smaller render. Also tried toying around with the size of the preview window but I'm unable to resize it.
I'm afraid I have no idea. I use the preview window all the time, and have never seen it do that. Does reloading the CK not help any? Is it ANY object, or just a particular one? Does the same thing happen in the Object Palette's preview window (World->Object Palette)?