Oh, and count me as one of the people who had no idea that the faces of the Winklevoss twins were digitally grafted on. I had no idea until I watched the bonus features on disc two. I wonder if I'll be able to notice it on my next viewing.
it's pretty noticeable in one of the rowing scenes, iirc. i have to say, though, i probably wouldn't have ever noticed it if it hadn't been for that behind-the-scenes feature.