I have a problem in NFS Shift. My main profile worked fine until just after Tier 3, when the game became very slow and buggy. The weird thing is that when I created a new profile with same exact graphics settings the game runs at normal speed and everything.
GTX 460 [296.10 driver]
I've uploaded a video that shows what I've described:
The first part of the video is the slow profile, and the second part is the fast one. What can I do about this?