WebClient - Content-Type Override?

[Jeff Wang]

I'm trying to act as a proxy to a third party webservice, and need to
transform a REST request.  One issue that I have is that the
Content-Type header seems to get overridden no matter what I do.  The
code is actually very simple (context is an @Context MessageContext
variable):

                WebClient client = WebClient.create(url)
                        .header("real-header-removed",
"auth-string-removed")                  
//                      .header("Content-Type",
context.getHttpHeaders().getMediaType().toString());
                        .type(context.getHttpHeaders().getMediaType());

                Response resp = client.get();
                return (InputStream)resp.getEntity();

Neither the .header nor the .type worked.  The tcpmon output of the
request is:
Content-Type: */*
real-header-removed: auth-string-removed
Accept: application/xml
User-Agent: Apache CXF 2.3.5
Cache-Control: no-cache
Pragma: no-cache

How do I avoid the content Type override (or rather, why is it
happening?)
Btw, while looking for answers, I found my CXF server side answers
relatively easily either via google or the archive.  But client
questions seems to be rather rare, and mostly on the SOAP calls.  Are
most people using other packages?

thanks
Jeff