WCF WebHttp Service returns HTTP 415 “Unsupported Media Type”

When I was developing my demos for PDC10 I ran into a problem.  I was using some new HTTP activities for the next release of WF and invoking a simple console application with an HTTP POST.  For some strange reason I ran into the following error RequestPOST http://127.0.0.1:8080/Marketing HTTP/1.1Content-Type: application/xmlHost: 127.0.0.1:8080Content-Length: 91 Expect: 100-continueConnection: