Weird Crash with Creative mode, and standard zombie possestion, i was attacking a villager, and from the look of it, but i can not confirm, I became her and crashed? Also the world auto crashes on logging in now, and after 3 attempts i can't use the world anymore.

You can check out the crash log here:
report

That's the indev 6 (previously 0.6), which was indeed very buggy. Please update to the new Beta.