XenForo 1.4.0 Beta 2 is now available to all customers with active licenses. This release primarily focuses on fixing bugs, conflicts, and usability issues discovered since the release of XenForo 1.4.0 Beta 1. This release also includes the same XML-related security fix as XenForo 1.2.6 and 1.3.5. We recommend all customers running 1.4.0 Beta 1 upgrade as soon as possible. Please note that in order to resolve this security issue, XenForo's PHP requirements needed to increase slightly. This release now requires PHP 5.2.11 or higher. This is beta software. It is not officially supported. We do not recommend running it in production. Please remember that this is beta software. It contains known bugs and incomplete functionality. We do not recommend running beta software in a production environment, and support is limited at this time to questions here on the community forums. If you choose to run beta software, it is your responsibility to ensure that you make a backup of your data. We recommend you do this before attempting an upgrade. Installation and Upgrade Instructions It is highly recommended that you back up your XenForo database and files before you attempt to upgrade. This is doubly important if you have ever installed add-ons that may create conflicts. Full details for how to install and upgrade XenForo can be found in the XenForo Manual. All customers with active licenses may download XenForo 1.4.0 Beta 2 from their customer area.