This update changes the way weapon stats are calculated.
Every zombie you kill with an eligible weapon will now gain you 0.25 stat points for that weapon.
The old calculation way was adding a stat point when you kill 3 zombies in a row. This meant that if you would have killed 2 zombies and then disconnected, that work would have been lost. It was also vulnerable to exploits such as the weapon swap.
The stat progress window has been tweaked, it now shows full weapon names and displays correctly on different resolutions.
There were also some bug fixes regarding zombie kills counter.