[_pmf_]

Should this really be considered to be a spec violation? It's a restriction, sure, but S3 is to be considered a specific application with specific constraints.

[rkeene2]

Does S3 use HTTP ? If so, it's a violation of the specification of S3 by way of incorporation of the HTTP specification.

Otherwise, if S3 does not use HTTP, we would need to see the S3 specification to determine if it (the implementation Amazon uses) is in violation