What is the gdb file if you have not been able to reproduce? The backtrace doesn't look wrong, could you get a valgrind log as described on https://wiki.ubuntu.com/Valgrind?
-- rhythmbox segfault in gdk_window_set_transient_for https://launchpad.net/bugs/61944 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
