The PHP development team would like to announce the immediate availability of PHP 5.2.10. This release focuses on improving the stability of the PHP 5.2.x branch with over 100 bug fixes, one of which is security related. All users of PHP are encouraged to upgrade to this release.
You can find a complete listing of the bugs corrected in this release in the release announcement and the Changelog. These latest packages can be downloaded from the main PHP site (or your local mirror).
Ilia Alshanetsky has also blogged about it here.