If you try rolling back to the previous patch, do you still have the freezing?
I would guess this sort of thing might be more related to system changes than anything from the patch, but always good to narrow things down more before making too many assumptions
One other suggestion, which may or may not be applicable, but have you restarted your system lately? I've found that sometimes things can get laggy after a long time of just sleeping my system but not actually restarting and a restart will clear things up.