I've seen this happen a few times since playing around with BB3, so thought I'd mention it here t highlight the bug, but to also help anyone who might not spot where their character/actor has gone. I noticed whilst flicking back and forth between actor, world and obstacle menus, that sometimes, the actor would slip out of the characters menu into the objects menu. You don't spot this immediately, until you go to preview your game and wonder why the hell your character is all screwed up. Fix: You simply drag the actor back into the character menu and all is well again. Hopefully it's on the bug list to fix.