A small hotfix has just gone out to fix a bug on linux dedicated servers which prevented the ZED and Axe weapons from not being purchasable at the trader. In addition, some achievements have been updated:
Highlander - Now unlocks properly
Back to work - Now unlocks properly
Bloody Christmas Carol - Now unlocks properly
Can't Catch Me - corrected to 2 kills rather than 5
Highlander - Now unlocks properly
Back to work - Now unlocks properly
Bloody Christmas Carol - Now unlocks properly
Can't Catch Me - corrected to 2 kills rather than 5