Comment 7 for bug 1352193

Sean Dague (sdague) wrote :

The glance v1 API which the Nova images proxy is based on put metadata via headers. That means they are case insensitive. Nova will continue to do this regardless of backend, which means when talking to a v2 server, your metadata might be wrong.

The Nova image proxy should not be used, and Glance should be interacted with directly.