A new version of the Windows Azure AppFabric SDK is available for download starting 8/12. The new version introduces a fix in the Windows Azure AppFabric SDK for the following Service Bus bug:
Adding a Ws2007HttpRelayBinding endpoint that uses TransportWithMessageCredential security mode to a ServiceHost that also exposes a local MEX endpoint (not visible through the Service Bus) using the mexHttpsBinding, causes the local MEX endpoint to stop working. Invoking the MEX endpoint results in an InvalidOperationException.
The fix is included in the updated SDK download. If you are not experiencing this bug, there is no need to download the new version of the SDK.
The Windows Azure AppFabric Team