Hey ho survivers, yesterday the new update 0.55 arrived.

The new change log look like this:

April, 1st: 0.55 Update is Live on Stable Branch! (968MB)

Persistence Forced to ON (Central Economy is in!)
Global zombie spawns increased from 700 to 1100 (3x more than 0.54 Stable)
Pond water can give you Cholera
Cholera is counting on character’s immunity strength (Current health, blood & diet)
New UI is available, use “-newui” launch parameter (lot of bugfixes)

Found a Bug? Please use: http://feedback.dayzgame.com/

Source: http://www.dayztv.com/news/2015/04/dayz-0-55-update-features-items-list/

Enjoy und survive.
Cheers Shorts