Kid3 0.7 uses an old version of the KDE build system. I renewed it for the next release. You can apply the following patch for Kid3 0.7 to use the XDG menu system and thus place kid3.desktop in /usr/share/applications/kde.
http://sourceforge.net/tracker/index.php?func=detail&aid=1552959&group_id=70849&atid=529223 -- kid3 not showing in Gnome application menu https://launchpad.net/bugs/57508 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs