Got vista ultimate and just downloaded the dreamscene preview today. I'm running a core duo laptop with mobility X1400 ATI graphics. 7.1 latest vista catalyst drivers. I have dual monitors (two 1680x1050 high-def screens) and in dual monitor mode, the graphics card just barely can't handle the dreamscene and it glitches at about 15 fps and skips now and then. Very annoying. On one monitor it's as smooth as silk. Is there a way to keep dual monitors but use dreamscene on only one of the screens? right now i've just got my secondary mon off for the moment.