Grainy screen appearing on blender

Not sure if this is a problem but I’m noticing the display in blender is turning a grainy purple color. Nothing else is wrong though. The program works fine when it happens but it still weirds me out. Anyone know what might be the issue and if I should be worried? I’ll post a screen shot of what I’m talking about:


Try updating to the latest graphics card drivers
In the File / User Preferences / System panel try changing the window draw methon and try turning VBO on/off

yeah perhaps the video driver might have been corrupted. Updating the driver cleared up the problem. thanks!