The Apache HTTP Server Project has announced Apache 2.0.44, the seventh public release of Apache 2.0. The release is primarily concerned with security and bug fixes, but the project said it's also representative of a change in emphasis to make future upgrades to new versions easier.
The announcement placed special emphasis on three security holes found in the Windows versions of the server, which could cause it to alternately crash, access inappropriate files, or allow attackers to run arbitrary code.
In addition to the bugfixes and security patches found in the release, the project announced that from this version forward, more emphasis will be placed on ensuring an upgrade of the core Apache server won't require a recompilation of existing modules, making it easier to ugprade without changing configurations or updating modules, though this release will require a recompile of existing modules to upgrade to 2.0.44.
The new version may be downloaded at http://httpd.apache.org/download.cgi. The CHANGES_2.0 file linked on that page provides a full list of changes. Differences between Apache 2.0 and the older, still widely deployed Apache 1.3 may be found at http://httpd.apache.org/docs-2.0/new_features_2_0.html.