When you scroll through some application windows in Mac OS X, the contents in the window may become slightly distorted. This can occur when using certain ATI video cards.
The distortion can be described as ripples, waves, visual tears, or horizontal lines, and the distortion location and intensity can change, depending on the size of the window and the speed at which you scroll. The distortion only appears inside of a window—never outside—and it disappears when you stop scrolling.
Important: This does not indicate a hardware issue that requires repair, nor is software troubleshooting necessary.
Safari, some games, and some multimedia applications that display animated content may turn off "coalesced updates" to improve performance. This can lead to the visual symptoms described above. Coalesced updates that are designed to eliminate visual "tearing" or other display artifacts can reduce display performance.
This document will be updated as more information becomes available.
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple's recommendation or endorsement. Please contact the vendor for additional information.