I've created a WCF service and when I browse to the endpoint I get the following fault:
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Body>
<s:Fault>
<faultcode xmlns:a="http://schemas.microsoft.com/ws/2005/05/addressing/none">
a:ActionNotSupported
</faultcode>
<faultstring xml:lang="en-GB">
The message with Action '' cannot be processed at the receiver,
due to a ContractFilter mismatch at the EndpointDispatcher.
This may be because of either a contract mismatch (mismatched
Actions between sender and receiver) or a binding/security
mismatch between the sender and the receiver. Check that sender
and receiver have the same contract and the same binding
(including security requirements, e.g. Message, Transport, None).
</faultstring>
</s:Fault>
</s:Body>
</s:Envelope>
I've fixed the problem but didn't enjoy the experience! Does anyone have any tips or tools for debugging problems like this?