I have the dbgsym package installed (networkmanager-dbgsym) but looking at the crash file, I couldn't see any stack trace (?).
** Attachment added: "Apport crash file" http://librarian.launchpad.net/6999368/_usr_sbin_NetworkManager.0.crash -- [apport] NetworkManager crashed when already running https://launchpad.net/bugs/88495 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs