512MB system memory, 64MB video. It's obviously not up to par with the times, but I never had this issue in beta and it only popped up within the past two days or so. I have been alt+tabbing a lot and running things like Firefox and IRC in the background, and I'm sure that doesn't help things. I'd get some RAM and a new video card, but there really isn't a point now that everything coming out these days is PCI-E. I might as well save up for a complete system overhaul.