Yeah, I've gone around and around with this. We updated our VUM, Client, and VC to U1 (though the VC upgrade was a bit dodgy and we had to MacGyver our way through that... upgrade script didn't like our service user running as sysadmin in SQL, but wouldn't let us pass when we took it off, so we flipped the permissions half-way through the script and that did the trick.) As for ESX, however, the ESX update 1 reports as incompatible in VUM, and when we try to do the manual process we get: "Requested VIB rpm_vmware-esx-vmkernel64_4.0.0-1.9.208167@i386 conflicts with the host." Bottom line at this point is that we have all ESX servers sitting at 175625 with no apparent way forward to U1.