Just wanted to know if GMA 950 (I have an older mid-97 white model) or the mini-DVI is to blame, or if there's something I'm missing and can hopefully correct. I just had the same file playing on my Macbook hooked up to my HDTV at the same time as the ATV and the difference was striking. The colors were much less vivid on the Macbook. The only difference is that I was using VGA instead of HDMI, but I'd be surprised if that was the main reason. Thanks for any explanation!