A month or two ago I had to get the graphics card replaced in my MBP (it was one of the maligned 8600GTs). Ever since then, the second screen in Final Cut (when I have one hooked up) has had a really bad framerate, almost to the point of it being unusable. I really like having a bigger preview so having a screen sitting there without doing anything is a fairly big blow. Can anybody think of a reason it would be doing this or how to fix it?