Comment 1 for bug 1322056

well the key X-Account-Meta-Temp-Url-Key is really just user metadata, you can always set X-Account-Meta-Foo or any other user metadata key. It just so happens and maybe it's unfortunate that a very common piece of middleware that's enabled in a bunch of clusters is using this particular key in the user metadata space for a well understood purpose - but it's as completely meaningless and inscrutable as any other key in the user metadata namespace without the tempurl middleware installed. Nevertheless, I think it would be a violation of the user metadata namespace to restrict this particular key in the general case.

I am personally of the opinion that it *would* be reasonable to explore the idea of moving Temp-Url-Key to sysmeta (probably X-Temp-Url-Key at the api level). And it should be fairly manageable to support fully backwards compatible translation for reads and writes without a migration on the account db's - maybe it would be a good idea for someone interested in seeing that to work on it...

But I don't think this is really a bug?