I\'m a little confused about how SOAPAction is implemented in WCF (and other web service frameworks for that matter).
In a test client, I have a Client Message Inspe
This is a problem with WCF not following the standards.
SOAP 1.1 uses the SOAPAction header to decide what method to call, but this was a bit messy as the method name was embedded elsewhere in the message. SOAP 1.2 resolved this and added the action to content-type header, and deprecated the SOAPAction header (though its now an optional for those clients that still want to send it).
See an o'reilly blog page for some details.