Comment 3 for bug 751610

unity/src/PlacesHomeView.cpp:

  PlacesHomeView::PlacesHomeView ()
  {
    …
    //In case the GConf key is invalid (e.g. when an app was uninstalled), we
    //rely on a fallback "whitelist" mechanism instead of showing nothing at all
    …
    _music_alternatives.push_back("banshee-1");
    _music_alternatives.push_back("rhythmbox");
    _music_alternatives.push_back("totem");
    _music_alternatives.push_back("vlc");
  }

which would be easy enough to fix, however:

  $ gconftool-2 --get /desktop/gnome/applications/media/exec
  banshee-1

shows that this is being populated/saved somewhere and therefore will need some extra code somewhere to migrate that stale value.

/desktop/gnome/applications/media/exec