Did you try to recreate the SOAPUI stubs from the WSDL generated by 2.0.1? Does the same error occur?
Initially I had annotated my Interface, and my implementation, with the default values for the @WebService annotation.
The interface and implementation, were in different packages, so they had different target namespaces.
The problem went away when I specified the same targetNamespace for both the interface and implementation.
This should be in the FAQ,
if the interface and implementation are in differnet packages, then they must have same targetNamesapce explicitly specified.