When I get to a late state in the game beta 11 graphics slow to a crawl and the game has a lot of jittery motion when scanning. Sometimes the screen freezes in place for periods of time. I remember having this problem a couple of beta versions back.
Note that this happens to me in beta 11 only. Beta 10 is perfectly fine. I'm really hoping it can be fixed before the tournament because it was messing me up a lot last night. I couldn't scrap buildings for a period of time or scan to my distant silicon mines because it would freeze.