From PHP.net :
The PHP development team would like to announce the immediateavailability of PHP 5.2.7. This release focuses on improving the stability ofthe PHP 5.2.x branch with over 120 bug fixes, several of which are security related.All users of PHP are encouraged to upgrade to this release.
Further details about the PHP 5.2.7 release can be found in the release announcement for 5.2.7, the full list of changes is available in the ChangeLog for PHP 5.
PHP 5.2.7 is now available on Dotdeb for Etch (amd64/i386) and there’s a great news : libapache2-mod-php5 is now compatible with apache2-mpm-itk.