The Location header must always point to an Atom Entry Document
Change the following sections of Draft-09 to read:
5.2 ... 2. If the Member resource was created successfully, the server responds with a status code of 201 and a Location: header that contains the URI of the Atom Entry Document representing the newly created resource. 5.3 Once a resource has been created and the URI of its Atom Entry Document (its "Member URI") is known, that URI can be used to retrieve, update, and delete the resource. 8.1 ... If an Atom entry was created in the collection which received the POST, the URI of the entry MUST be returned in an HTTP Location header.