According to a new post on the main PHP site, they've released the latest version in the 4.4.x series - PHP 4.4.2.

The PHP development team is proud to announce the release of PHP 4.4.2. This release address a few small security issues, and also corrects some regressions that occurred in PHP 4.4.1. All PHP 4 users are encouraged to upgrade to this release.

Further details about this release can be found in the release announcement and the full list of changes is available in the PHP 4 ChangeLog.

Some of the things that this edition fixes includes: HTTP Response Splitting has been addressed in the header() function, an XSS problem inside the error reporting functionality has been removed, and Apache 2 regression with sub-request handling on non-Linux systems has been fixed.

So, head on over and grab this lastest distribution and upgrade today!