Bones slowly coming out of their sockets (bone tool)

[Jon Chambers]

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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?

[Jon Chambers]

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.