I noticed this morning that the Team Foundation WebLog has a post concerning a change to the upgrade process from RC to RTM. While this was not expected to require a change to the database, a recent decision has meant that administrators will need to upgrade the TFS database. Having said that, the new process from the blog post should be;

1. Uninstall RC
   • Run TfsUpgradeRTM.exe
     • Install RTM.
       • Upload Reports.</ol> Now you really can’t complain too much about that

       Read the blog post here