I just did run into exactely the same issue. No login possible after that update, when chrooting from a rescue system zsh did segfault.
i was lucky to find bash still usable and i managed to identify libnss-ldap as the cause and could sucessfully downgrade to 264-2.5 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
