I think I understand this bug report. If you install rhythmbox in the live session you instantly get a rhythmbox icon in the place of 'listen to music' but if its not installed clicking 'listen to music' opens firefox. affecting gnome-control-center for now might be some other package responsible.
** Also affects: gnome-control-center (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-control-center in ubuntu. https://bugs.launchpad.net/bugs/729952 Title: rhythmbox is the default music player -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs