Don't know if this has any connection to comments regarding what is perceived as a stutter problem... In the setup.ini file there is a variable named smoothcamerakeys which defaults to "0" if I change it to "1" the stutter while walking around goes away. There is also an improvement in the walking sound being in generated. On my system setting this variable to "1" not only gets rid of the stutter but now gives me the sound of two footsteps (I think) and no longer sounds like I am walking with wet tennis shoes.
Some one might what to try changing this variable back and forth and confirm.
Don't want to beat a dead horse but ... WASD vs Arrow keys.
WASD keys = stutter
Arrow keys = NO stutter.
Change variable smoothcamerakeys to 1 = no stutter using WASD keys.
Operating System: (Windows 8.1 64 bit) Processor: (AMD FX-6200 Six-core - 3.80 GHz) Memory: (10GB) Display Adapter
NVIDIA GEFORCE GTX 660 SUPERCLOCKED)