The following problem has been noted with Apple G4 "Quicksilver" models only when used with the Apple Cinema HD Display (23" flat panel) and Pro Tools. This problem only occurs when using the highest resolution of the 23" HD Cinema Display (1920 x 1200).Edit Window: Waveform overviews, waveform backgrounds, and grid lines are not drawn or are drawn over by gray "boxes", when scrolling down with Apple 23" Cinema Display.Update - December 9, 20002This problem has been fixed for Pro Tools|HD Systems:Download Pro Tools 5.3.1cs4 from the following location: digidesign.com - December 20, 20002This problem has also been fixed for Pro Tools|24 & MIX Systems:Download Pro Tools 5.1.3cs9 from the following location: digidesign.com