All details of the update can be found at http://www.eu-emi.eu/emi-2-matterhorn/updates/-/asset_publisher/9AgN/content/update-5-14-11-2012-v-2-4-0-2
Updated artefacts can be found in the "Updates" section of the EMI Software Repository at http://emisoft.web.cern.ch/emisoft
The EMI team strongly recomments not to use automatic update procedures of any kind on the EMI middleware repositories and EPEL. You can keep it turned on for the OS. You should read the update information provided by each service and do the upgrade manually when an update has been released.
To report any issues with this update you can use GGUS at www.ggus.org . To help EMI improve its products and services you can participate to discussions on the User Forums at http://www.eu-emi.eu/forums-mls .