From the Patchy dept.:
The Apache HTTP Server Project is proud to announce the release of version 2.2.4 of the Apache HTTP Server ("Apache"). This version is principally a bugfix release.

This version of Apache is a major release and the start of a new stable branch, and represents the best available version of Apache HTTP Server. New features include Smart Filtering, Improved Caching, AJP Proxy, Proxy Load Balancing, Graceful Shutdown support, Large File Support, the Event MPM, and refactored Authentication/Authorization.

httpd.apache.org