I've seen many of the bugs already mentioned in this thread, the only real problems I've had were with the backpacks sinking into the world and not being retrievable outside of the command in the menu, and the new one that I haven't seen mentioned here is with shared saves.
I logged into to hose a shared world I've got with 2 friends this morning and my save was magically deleted. I was able to load a backup , but now my friends can't see the game if I'm not online and when I try and create a shared copy of the world the game crashes.
