Symfony 0.4.3 brings you some new cool features: built-in RSS support built-in email support more AJAX helpers: input_in_place_editor_tag and input_auto_complete_tag new cache system and a lot of bug fixes and small enhancements... These features will be explained step-by-step during the symfony advent calendar tutorial. Before upgrading, please read the manual modification required to ugrade. To upgrade your symfony installation, type: pear upgrade symfony/symfony Don't forget to clear the cache of all your projects by calling in each of them: symfony cc Note: for the users of the beta release the 0.4.3 is equivalent to the 0.5.220. You can keep on using nightly builds. Note: You can see major changes in the CHANGELOG file.