Constant crashes when I host

[Sleipnir]

Could you post your server.log and exception.log from one of these crashes?
We've heard a lot of people mention these crashes, but I haven't yet seen any logs, which should point us toward the cause.

[Sleipnir]

It looks like someone with an old build is joining your game, and causing it to instantly desynchronize.

A fix for this is being worked on, and will appear in one of our next releases.