Jaikoz v2.5.0 beta is out now please give it a go. One of the most exciting developments is support for fixing genres from Musicbainz folksonomy tags, and adding your own genres back to Musicbrainz. Unlike the majority of Musicbrainz data Folksonomy Tags are subjective rather than factual so it will be interesting to see how the folksonomy tag cloud develops.
Jaikoz is the first application to support submitting genres back to Musicbrainz. Before this release Musicbrainz Users had to enter tags using the website or write their own scripts to do this.