Last week the PHP development team released new versions of PHP 5.3.21 and 5.4.11. These releases fix over 10 bugs.
For those that like to live in the leading edge, or like to play with new features coming to PHP, we have created initial packages of PHP 5.5. To install it, just install php55 on your favorite distro (CentOS 6.3, Ubuntu 12 and Debian 6). We will update these packages as new versions come out. Please do not use this in production!