That new crash file looks like http://bugzilla.gnome.org/show_bug.cgi?id=372697 upstream, the valgrind log points no error though. What lines did you add to /etc/hosts to trigger the crash?
-- [network-admin] Crash when starting from menu. https://launchpad.net/bugs/67936 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
