After I have set my config and started a new game, If I am not happy with any of the graphics or input settings and change them, then the next time I try to load the game it will crash during the game loading screen, after I hit Play.
To fix this I need to delete my User_settings.DayZProfile in documents\dayz
After I delete this it will allow me to continue playing.
The two times it has done this has been when I change the brightness or switch from inverted mouse to non inverted or back.