Redhat 7.1 upgrade (from 6.2), FTP install, because of my own over jealous rsync exclude file our mirror was missing a couple of RPMS from the install directory. The installer couldn't transfer the files from the mirror, but no message was ever printed to VC1 where the install was taking place. The only mention was on VC3.
*** This bug has been marked as a duplicate of 36542 ***