So just to go over the basic points:
- You are confident the matrix gm_Matrices[MATRIX_WORLD_VIEW_PROJECTION] is updated every frame correctly (no silly error in the camera class)?
- You confident this is a UV coordinate issue and not for example vertices moving or a depth buffer problem?
- You don't have any hardware extras turned on in the Catalyst utility, particularly relating to anti-aliasing?
- You are confident this has nothing to do with the reflection mapping you seem to be doing?
Edit: and have you tried turning down vsync and matching the frame rate in catalyst if it lets you?