PHP have now announced that the latest versions of PHP have been released today, they are 5.3.19 and 5.4.9.
This releases fixes about 15 bugs. All users of PHP are encouraged to upgrade to PHP 5.4.9, or at least 5.3.19.
The full list of changes are recorded in the ChangeLog on http://www.php.net/ChangeLog-5.php
If you are running an older version of PHP then we would always recommend updating to the latest stable version of the branch you’re on.