there's a few problems with this character, which i can now enumerate and prevent myself from making again.

At present 2.57 blender foundation rc2
- can not add/subtract geometry without loosing all sculpt information.
- it is unwise to rotate/flip edges, delete vertices.

Make sure there is plenty of geometry around sections that are likely to have folds/details (eyes, fingers & nails, skin folds). I don't like redoing things, but for this character i will make an exception as it's a learning process and the feature is going to be improved this summer in the google summer of code.