This looks like an OpenGL error. What it means is that your graphics card driver is not functioning correctly. If you have not downloaded the latest updates for your Mac, then doing that might solve your problems right away. Apple is usually pretty good about fixing these kinds of things quickly. If the latest graphics updates don’t fix this problem, then you should let Apple know. ColorThink uses graphics differently than a lot of other applications, so you might see this sort of thing with your other graphics apps or you might not.