content-type for unauthorized requests is set incorrectly

curl -v -H "Accept: application/xml" http://172.19.0.3:8774/v1.0
* About to connect() to 172.19.0.3 port 8774 (#0)
* Trying 172.19.0.3... connected
* Connected to 172.19.0.3 (172.19.0.3) port 8774 (#0)
> GET /v1.0 HTTP/1.1
> User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.18
> Host: 172.19.0.3:8774
> Accept: application/xml
>
< HTTP/1.1 401 Unauthorized
< Content-Type: text/html; charset=UTF-8
< Content-Length: 316
< Date: Tue, 29 Mar 2011 17:44:38 GMT
<
<unauthorized code="401">
    <message>
        This server could not verify that you are authorized to
access the document you requested. Either you supplied the
wrong credentials (e.g., bad password), or your browser
does not understand how to supply the credentials required.

    </message>
</unauthorized>
* Connection #0 to host 172.19.0.3 left intact
* Closing connection #0

As you can see above, the Content-Type is "text/html" when it should be "application/xml".