Linux mint cinnamon 17 64 bit
Intel i7 3770
Geforce GTX 650
RAM 8 GB
Official blender release 2.72
Slight mouse look threshold even set at zero.
Add camera
Set up logic: sensor as mouse movement, controller as AND, actuator as mouse look.
Enables x and y axis
Set threshold to zero
Play in standalone player
Notice slight threshold{F115191}