Yes, we do have vCenters in the environment. After many long hours working on this, with the help of support, we have been informed that vReplication does not work in 6.0. They are working on a fix. We now are in the process of downgrading to 5.5 (or maybe even back to 5.1) in order to get vReplication working again. Once VMware fixes the 6.0 problem, we'll try upgrading back to 6.
Very frustrating.
Dave