This stems from
If a faultTo is set, the DecoupledFaultHandler uses the incoming message as a base for the outgoing. This has two affects:
1) The protocol headers on the incoming message are then resent to the fault endpoint which is confusing and definitely should not be sent.
2) For some reason, the fault is then ALSO returned on the original HTTP connection instead of a partial response. Need to verify what is really needed here.