Problems updating address.country

I'm curious if anyone else using the 2010.1 WSDL is having any trouble updating the address.country field on the Customer record?

using the enumeration:  address.country = Country._canada;

Seems to have no effect and i never see this in the SOAP request.

All other address fields seem to be updating as I would expect.

Here's the code I'm using for Address:
CustomerAddressbook address = new CustomerAddressbook();
   address.defaultShipping = true;
   address.defaultShippingSpecified = true;
   address.defaultBilling = false;
   address.defaultBillingSpecified = true;
   address.label = "Shipping Address";
   address.addressee = "William Sanders";
   address.attention = "William Sanders";
   address.addr1 = "4765 Sunset Blvd";
   address.city = "Canada City";
   address.state = "ON";