Apple today unveiled an update for the Mac Pro ATI Radeon HD 2600 XT graphics card, which was suspected of causing mass system instabilities in those machines. The 792KB update requires Mac OS X 10.5.2 with the latest Leopard graphics update, and is said to improve overall system stability. As with most recent updates, the specific problems and fixes are not listed. The issue was affecting all of the new model Mac Pros, regardless of how old the actual tower was.