Jaikoz 6.0.0 just released, we have made this version a major change because it is the first release of Jaikoz to use Java 7 on all platforms, in future releases this will allow us to fix many old bugs that couldn’t be fixed using Java 6.
http://www.jthink.net/jaikoz/jsp/news/build1124.jsp
Importantly this release fixes the iTunes regression introduced in Jaikoz 5.7.0 AND now uses Java 7, this also makes it compatible with OSX 10.9 (Mavericks). So this release is mostly an OSX release but there is also a fix for Manual Correct from MusicBrainz that applies to Windows and Linux as well.
Of course now that this OSX release uses Java 7 it will not work on earlier versions of OSX that do not support Java 7, that is OSX 10.6 or earlier. Because of the iTunes integration problem in Jaikoz 5.7.0 the best version to use is Jaikoz 5.6.0