You got it.
Jul 3 2016
May 11 2016
May 10 2016
Also a zombie can push you through the walls.
Confirmed since the first public release on steam.
The weird colors are there for longer when in main menu, but as huiduke stated the colors appear for very short time in game.
I believe dayz is supposed to have negative mouse acceleration to make it feel more realistic. With negative mouse acceleration on one can't simply turn around that fast and aim for the head in a split second timing.