Just to note, so far I have enabled the default base, extras, updates repositories from CentOS, and in addition the Dag repository for RHEL5 and adobe repository for flash.
Excuse me again for not going to CentOS list for this, it seems obvious that a lot of people here use CentOS as well, so... ;-)
You are running an enterprise server and getting support for it from a cutting edge mailing list because of laziness/pride or both? Read up the Wikis on CentOS and see how to get community support "properly".
Regards, Vandaman.