Comment 7 for bug 881014

Not sure if it is same, but am having scrolling glitches similar to this, with similar work-around (ie. refresh cures it) using Unity 3D. Problem goes away with Unity 2D. Problem manifests with all applications tried that produce scroll-able window, also Chrome and Firefox browsers. My system is an HP NC6000 laptop. When glitch occurs, sometimes a rectangle is not redrawn, sometimes the shape is a torn rectangle (ie. portion of rectangle got shifted up, portion not shifted, in middle of window).