I have the last rev. pb and updated to itunes 7 and also updated it. My issue is that ever since i updated, i have had issues of it not displaying correctly. When i try to view the visualizer, it appears as a blank box. Also, earlier i opened up itunes and some of the window didnt display itunes but what was on my screen. there also seems to be a lag at times where when i try to move the window it creates a cascade effect similar to winning solitare on windows. i will get a screenshot when it happens again. but any ideas on my problem or any chance i can revert to itunes 6?