EmailPreference setting

Hi,

I'm creating some resource groups using the PowerShell cmdlets but having some trouble with the "EmailPreference" parameter. the documentation says the possible values are "Always, Never, OnError, OnErrororWarning" but whatever value I specify it always sets the value to "Always".

Is anybody else seeing the same issue or know if I need to pass it a specific object type rather than a string?

Thanks

Ash