The PHP project has released the latest in the PHP 5.3.x and 5.4.x series today - PHP 5.4.8 and 5.3.18:
The PHP development team announces the immediate availability of PHP 5.4.8 and PHP 5.3.18. These releases fix over 20 bugs. All users of PHP are encouraged to upgrade to PHP 5.4.8, or at least 5.3.18. Key enhancements in these releases include: fixed bug #63111 (is_callable() lies for abstract static method) and fixed bug #61442 (exception threw in __autoload can not be catched.