The Symfony project is recommending you upgrade your plugins to the latest editions - an issue with the PEAR channel caused it to load the wrong ones:

A problem in the symfony project PEAR channel made the plugin-install task always install the oldest version of the plugins, instead of the latest. If you recently installed plugins with the symfony command line, you probably installed an outdated version. Plugins installed via SVN are not affected.

You'll need to run a plugin-upgrade command for each of the plugins installed on your system to ensure that you're completely up to date. The post has complete info on how to tell which plugins you have and the exact commands to issue to being them up to date.