Hey,
Sorry, yes, early access. Gonna have bugs. We're currently looking at this particular one, because a few people have had the same issue. Could you give us more information about your hardware? We're unable to replicate the issue on all the computers we've tried on, so we believe there's some difference between what we're using and what you are.
Specifically: Which operating system (including 32/64 bit), CPU and total RAM would probably be most helpful.
As far as we can tell, this is some kind of Unity issue, so we'll need to see if we can change how it compiles the .exe to avoid these issues in the future. Bug fix version will be pushed when we can figure it out.
Thanks for the report, including the image (it is useful to us to notice that the number in world panic is what it is, since that's 2 to the power 31, implying a 32 bit integer has somehow been mis-computed).
Thanks again,
BobbyTwoHands