The Joomla Project is pleased to announce the immediate availability of Joomla 2.5.11. This is not a security release. This release fixes some problems introduced in the 2.5.10 release. The Production Leadership Team's goal is to continue to provide regular, frequent updates to the Joomla community. Click here for full release information
We are familiar with the implementation of the upgrade and are currently upgrading multiple sites CONTACT US fora free proposal to update your site.