The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
And you seem to be throwing SND and XACT errors, which is an indication of some kind of sound hardware issue. Those generally always lead to random crashing. Proving that is fairly simple - get a log file from one of the other players that did NOT crash. They should be almost identical with the exception of the SND and XACT errors.