That's my work in progress if you want to see what I'm talking about.
As I animate with the bone tool, the bones seem to move out of their sockets at the speed of about a pixel a minute. This may not seem like a big deal, but over ten minutes it can really add up.
So, how can I prevent this from happening? Is it possible to recover this, or should I start over? What caused it?
Update: Further experimentation reveal that the bone tool just sucks. It doesn't matter where I put the anchor point, if it is reposed over enough key frames, bones will slowly come out of their sockets, no matter what.