1) Start dedicated server (windows server 2008 rc2).
2) Load CO 07 Headhunter (we played with 4 players).
3) Throw some grenades (we got 3-4 grenades out before crash).
4) First Yellow chain appears followed by "No message since 10 seconds".
5) Server (remotedesktop) says "ArmA3 has crashed".
Without using grenades, we can play every mission without problems.