Is there a reason why OFS.Image.Image does not __implement__ HTTPRangeInterface like OFS.Image.File does ? As far as I can see there's no reason it shouldn't, as their index_html method (and HEAD inherited from webdav.Resource) are the same. Florent -- Florent Guillaume, Nuxeo (Paris, France) +33 1 40 33 79 87 http://nuxeo.com mailto:fg at nuxeo.com