The only fix is: http://feedback.arma3.com/view.php?id=22907#c88528

Updating with steamcmd (also validating it) not working at all.

Same issue for me keep crashing with message:

bad animation file format in file acts_starterpistol_in.rtm

Hi, I'm Admin with Pearl84 on the same server.
I've uploaded the files from a crash just happened on our test server. I was alone on the server.

Thank for your help