I have Virtual Center 2.5 build 64192 and a few hosts. The one in question is ESX 3.5.0 build 64607, and I have two others at this same level that aren't having the problem.
The problem is on the summary tab of the host. The Reources section shows CPU usage: 0 MHz and Memory usage: 0.00 B
When i go to performance tab I see lots of cpu and memory, and this host has running VMs, so I know this isn't correct.
Any ideas why its showing zero? I have restarted Virtual Center with no effect.