http://test.musicbrainz.org/release/7fdab55c-056c-464d-ada8-5d1015907c2b/cover-art has a piece of cover art, but nothing is shown in the sidebar.

If we're only going to show covers marked as "front", then the message is incorrect because it implies there is no cover art at all, not that there is nothing marked as front. We should also indicate that we do have other covers. Otherwise there's no way of distinguishing a release with no cover art from a release with tons of cover art except none of it has been marked as front.

I would prefer to show the first available cover when nothing marked as front is available. That would solve both things.

UPDATE: the incorrect message has been fixed, so this ticket is now just about showing non-front cover art if we don't have front cover art (or alternatively, showing a message that other cover art is available). --warp.