Release Notes: White space past the end of header values was not ignored, causing a space-padded content-length header to be rejected as invalid. A few minor improvements were made. The halog tool was improved to support more filtering criteria and to be noticeably faster. There is no need to upgrade for already running setups.
Release Notes: A build issue on Linux distributions with glibc >= 2.10 was fixed. A minor precision about RDP cookies was added to the documentation, and a new ACL keyword was added. Those who had no problem building and running 1.4.5 don't need to upgrade.
Release Notes: Very minor issues were fixed, among which are a timeout which only struck on the second expiration. Support for HTTP 1xx informational messages was added. It is now possible to report the node name on the stats page. Some new ACLs were backported from 1.4 in order to match on IP addresses in headers and on queue length.