Release Notes: The argument syntax of "tail" and "sort" was changed for wider platform support. The previous syntax did not work properly on Fedora and related Linux platforms.
Release Notes: DiG 9.x support (BIND 9.x).
Release Notes: Minor bug fixes have been made.
Release Notes: Now uses the nameserver returning highest SOA serial number for zone transfers, malfunctioning nameservers ignored, added sanity-checking of nameservers' own names as well as various bug fixes and improvements.
Release Notes: Man page now documents all exit statuses and several bugs have been fixed.