Technical Note: Proxy Classes Different when using Svcutil.exe and VS Add Service Reference (doubleclick.com edition)

The WSDL url http://advertisersapi.doubleclick.net/v1.12/api/dfa-api/campaign?wsdl was used by a customer with the Svcutil.exe tool to generate a proxy class and associated message and data classes, and it worked fine. But when they tried to use the Add Service Reference... (often shortened to "ASR") wizard in Visual Studio, they had a problem: they could not import the fault contracts. In fact,