I have a similar problem - when creating things, if I try and auto-generate a name, I just get the same "BAD_DATA" entry. Trying the package clean and such, I'll see if that helps.
EDIT: Couldn't find the version, but quickly booted up a space level game and found that yes, all the stars are "BAD_DATA" too. Dang, I've only just reinstalled. Hope it's not all broken.