isaac256 :
I used 800dpi and that Polling Rate Problem (Now I know what its called xD) still persists. Mind you, I only notice this polling problem when I move the mouse quickly (turning around when someone is shooting at me).
The Problem you have is related to malfunction speed, i simply suggested turning off the lights and making the hz more stable to get rid of any possiblities.
isaac256 :
By any chance, do you have another idea on why its not working?
The QCK+ isnt particularly good for tracking, i would suggest trying another mousepad, like the Roccat Taito for Example.