I should've posted in the build notes, or somewhere for the test version... if "fixing world chunks" doesn't finish within like < 30 seconds, it's probably borked. I should definitely get that to fail more gracefully (error message, kick you back to main menu etc).
If you want to zip up the pre-test save file and email it over to steve@cairn4.com that'd be a huge help. There's def some modules that I think I still need to update.
Thanks!