Random horizontal lines, video tearing, ghosting and other graphical
errors occur rendering the Front Row Browser difficult to use.
The problems do not occur when viewing media in Quicktime Player or the
typical Apple DVD player but not all the blame can be attributed to the
Front Row media browser as similar problems have been reported
occurring when performing certain tasks in iMovie.
Apple are aware of the problem and advise anyone who experiences these
problems to contact it's AppleCare support team.