Link: http://trac.tools.ietf.org/wg/httpbis/trac/ticket/22
Component: p2-semantics
It's not clear what the headers in a response to a PUT apply to; for example, does an ETag apply to that response, or the response that would be returned upon a GET?
The same questions apply in other cases where the response serves as a status message.
Related: http://greenbytes.de/tech/webdav/draft-reschke-http-etag-on-write-08.html