When a S3 remote uses exporttree=yes versioning=yes public=yes, it's possible to use anonymous http to download anything from it. git-annex does not yet support that, nor does whereis show the urls.

Should not be super hard to add, but it involves converting getpublicurl into an Annex action and distinguishing between different uses of it, some of which work with this and some don't. --Joey

done --Joey