I just came back to the game today, and it has been rendered almost completely unplayable by random drops in the frames per second. One moment I'm playing just fine, but the next (and it doesn't really matter where I am) my framerates drop to less than 1 per second. I've put all the settings on low and i still get the same issue.
The game didn't do this when I was playing a number of months ago, just now when I started playing again. I'm using an Nvidia GTX 260m, intel core 2 duo at 2.66 ghz, 6 gig of ram, and on windows 7 64 bit