I got my MacPro in the mail last thursday. By the next day I had it mostly set up, then noticed that when playing DVD's, HD Movies, Games, and apples own screen saver Flurry. A line moves from the bottom to the top of the screen in about ten seconds, the line isn't black but rather you can see a time distortion between what is above and below the line. It basically looks like a VCR with the V-hold set wrong. This occurs every thing that moving 2D and 3D graphics are displayed across the screen. I called apple on sunday and giulded me threw software Checks, then advised that I take it in and set an appointment for me later that day. The "Apple Genius" that helped me was a total gerk. The said and wrote in his service report that he determined that the GPU s likly functioning under spec. and that I should have more resonable expectations. I would rely like comments. Is watching a tv show or a DVD with smooth play back an unresonable expectation. My system is a Quad proc 2.66 with 1 Gig ram and the X1900 XT graphics card.