What version and build of VC and ESX are you using?
Hello,
Been there bud, I know how you are feeling. Here is what I did. Connected to the host with WinSCP transfered the update to the local machine I re-ran the esxupdate -f update from the local disk and it went back to normal after that. VC2 and ESX 3
I rolled back the VC VirtualCenter 2.0.2 Update 2 (62327), it would appear VC 2.5 does not like 3.0.2 hosts that are fully patched...weird!