This is a rhythmbox bug and I see nothing dbus related in the backtrace
** This bug is no longer a duplicate of bug 66595
crash on startup
** Changed in: dbus-glib (Ubuntu)
Sourcepackagename: dbus-glib => rhythmbox
Status: Rejected => Unconfirmed
--
Crash when editing multiple files
https://launchpad.net/bugs/69212