Has anyone else who runs an external monitor in windows XP experience a quarter second flicker on the external monitor? It looks like text or something like that, it's only for a moment and it happens every 5 minutes or so. Its on my C2D MBP with the ATI X1600. Not a big deal, but I get scared something worse will happen as i do a 3 hour presentation on a projector every week and I've been noticing it occuring. Can this be fixed with a patch or something?