I've recently upgraded to vCenter 5.1 and decided to try out the new VDP (big mistake on my part)...
Anyways,
now I'm getting the following error in the backup tasks:
VDP: Backup job (Lab) failed to backup client Lab-MiscServices.
Execution error: E30927: An attempt was made to backup a virtual
machine client which noloinger exists in vSphere.. Job Id: Lab-Lab-1350950000105. (Full client path:)
and none of my VMs are being backed up... the guests are absolutely in vcenter and are running fine, so this has to be a VDP problem.