In commit acfcaf6366bd4695c1c37c7aa8ff5a176b412e2a, block mediagoblin_sidebar was removed from user_pages/media.html
Although, several media types rely on it to display extra information. I am supposing this was removed by accident, and not by design (which would, in some way, make sense since the commit is related to metadata stuff).
I've written a patch to put the block back in place. Actually I've placed it before the media_sideinfo template hook.
Anyway, this brings another discussion, since there are many different ways to "add" info to the sidebar: by extending the template, via template hooks, various includes and so on. Maybe we should have further thoughts and developments around this.
Looks good. Merged and pushed!