From the main PHP site, the latest version in the PHP 4.x series has been released and is availible for download - PHP 4.4.1.

PHP 4.4.1 is now available for download. This version is a maintenance release, that contains numerous bug fixes, including a number of security fixes related to the overwriting of the GLOBALS array. All users of PHP 4.3 and 4.4 are encouraged to upgrade to this version.

The full list of changes in PHP 4.4.1 is available in the PHP 4 ChangeLog.

Nothing huge in this release, but it's still a good idea to update your installation - the GLOBALS issue could cause some damage if left unchecked...