Well my new Mac Pro just arrived and was still sitting in a box by the front door when I heard about this. So now I'm anxious to try it out (what? start swapping parts out on my new machine already? Luckily I can't actually get my hands on the Quad Core cpu's yet, not to mention that the price will probably be prohibitive as an upgrade)
But anyway, I need an ADC-DVI cable first for the new machine or I can't use it! I'm so sad. My old machine gets one more night to live.
i'd send that Mac Pro back if you can and get the Quad-Core(8 cpu's) in a few months..