Hi Ansel,
I am also having problems with my Ultra Studio pro. My issue is the quality of the visuals on the external monitor is very poor. I did not have this in CS5.5. If I disable CUDA then the quality is fantastic but you then need to render if you add effects. I have also noticed if the Cuda is enabled the CTI is eractic as in when you scrub and stop and press space bar it jumps back and forward.
Darren