This just happened again, while adding med kits to my inventory, from a hunter truck.
Here are the dump files:
http://rapidshare.com/files/3799507247/Arma%203%20Alpha.rar
and here is what windows crash reporter reported
Problem signature:
Problem Event Name: BEX
Application Name: arma3.exe
Application Version: 0.54.103.957
Application Timestamp: 516582ca
Fault Module Name: StackHash_0a9e
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 00000000
Exception Offset: 00000000
Exception Code: c0000005
Exception Data: 00000008
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789