For reference, here's two tarballs with ~/.local/share/mime before and after I ran update-mime-cache in Squeeze (with my custom mime type text/x-abc registered for *.abc files).
mime-cache.tar.gz = generated by lennys update-mime-database. updated-mime-cache.tar.gz = the above + squeezes "update-mime-database ~/.local/share/mime/". -- Andreas Henriksson
mime-cache.tar.gz
Description: Binary data
updated-mime-cache.tar.gz
Description: Binary data
