The backtrace looks like http://bugzilla.gnome.org/show_bug.cgi?id=346284 which is fixed upstream and has a simple patch. Do you know how to rebuild a package with a patch?
** Bug watch added: GNOME Bug Tracker #346284 http://bugzilla.gnome.org/show_bug.cgi?id=346284 ** Also affects: rhythmbox (upstream) via http://bugzilla.gnome.org/show_bug.cgi?id=346284 Importance: Unknown Status: Unknown -- Edgy - Crash attempting to play MP3 stream (Internet radio) https://launchpad.net/bugs/59664 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs