With the latest update from Feisty, the X-RedHat- had been replaced with X-GNOME- prefix. Here's a quick grep of the files affected, and is in the Other category in Control Center.
$ grep -R X-GNOME- /usr/share/applications | grep -v X-GNOME-Bugzilla | grep -v X-GNOME-DocPath | cut -d/ -f 5| sed -e 's/:Categories/\nCategories/g;s/^/\n/g' accessibility-keyboard.desktop Categories=GNOME;GTK;Settings;X-GNOME-PersonalSettings;Accessibility; at-properties.desktop Categories=GNOME;GTK;Settings;X-GNOME-PersonalSettings;Accessibility; default-applications.desktop Categories=GNOME;GTK;Settings;X-GNOME-PersonalSettings; gnome-about-me.desktop Categories=GNOME;GTK;Settings;X-GNOME-PersonalSettings; gnome-network-preferences.desktop Categories=GNOME;GTK;Settings;X-GNOME-NetworkSettings; gnome-power-preferences.desktop Categories=Settings;X-GNOME-SystemSettings; keybinding.desktop Categories=GNOME;GTK;Settings;X-GNOME-PersonalSettings; session-properties.desktop Categories=Application;Settings;X-GNOME-SystemSettings; Also, other desktop entries are appearing in the Other category with a "Application;Settings" Category, here's the grep results. $ grep -R "Application;Settings;" /usr/share/applications | grep -v X-GNOME- | grep -v "Application;Settings;[A-Z]" | cut -d/ -f 5 | sed -e 's/:Categories/\nCategories/g;s/^/\n/g' hplip.desktop Categories=Application;Settings; nautilus-file-management-properties.desktop Categories=GNOME;Application;Settings; vino-preferences.desktop Categories=GNOME;GTK;Application;Settings; gshare-manager.desktop Categories=GNOME;Application;Settings; hp-toolbox.desktop Categories=Application;Settings; gpilotd-control-applet.desktop Categories=GNOME;GTK;Application;Settings; control-center.desktop Categories=GNOME;Application;Settings; -- Categories prefixed with X-RedHat-* is in the Other category. https://launchpad.net/bugs/82579 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs