This bug report is basically the same problem and has the needed backtraces.
https://launchpad.net/distros/ubuntu/+source/rhythmbox/+bug/59585 ** Bug 59585 has been marked a duplicate of this bug -- rhythmbox crashing/freezing on song import https://launchpad.net/bugs/59394 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
