If I play the game with the leaderhead setting at anything other than minimal, Civ 5 will completely hose my system causing intermittent freezing until I reboot. I'm using an EVGA GTX 560 ti and it will run everything at max quite smoothly until I interact with AI civs. I have to guess and say it's an nvidia problem as I never had this problem on my previous machine with a HD 5850. Is there anything that can be done or do I have to wait for another patch or new drivers? I like the leader animations and would like to keep them enabled.