This should have been fixed with 2.72ubuntu4. If it still fails for you, can you please attach your /etc/apt/apt.conf.d/20listchanges config and let me know if you have /usr/bin/sendmail (it uses this file to test if it can mail or not) ?
Thanks, Michael -- [apport] apt-listchanges crashed with IOError in mail_changes() https://launchpad.net/bugs/85031 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs