Does Invoke-VMscript in PowerCLI 4.1.1 still needs special priviliges on ESX hosts, like in previous versions ?

Does Invoke-VMscript in PowerCLI 4.1.1 still needs special priviliges on ESX hosts, like in previous versions ?
With powercli 4.1 I never figured out how to use Invoke-VMscript without using root ESX account credentials, which is no go.