@phpdeveloper.org
The PHP group has officially released the latest update in the PHP 5.1.x series today - PHP 5.1.4, a bugfix release to take care of the $_POST array handling problem from 5.1.3.
A critical bug with $_POST array handling as well as the FastCGI sapi have been discovered in PHP 5.1.3. A new PHP release 5.1.4 is now available to address these issues. All PHP users are encouraged to upgrade to this release as soon as possible.
Further details about this release can be found in the release announcement and the full list of changes is available in the PHP 5 ChangeLog.
Due to the wide-spread nature of this bug, updating to this latest version would be a very good idea. There are a few other bugs that were fixed in the release as well including issues with the FastCGI sapi, a fix to a possible crash in hightlight_string, cloning of DOM Documents and Noded, and several fixes to the PDO ODBC driver.
You can download this latest update here.