It's a bit unfortunate that this makes the `thumbnail` component less of straightforward HTML fragment to use, although I can't immediately think of a better way of tackling this. Can you give a little more thought to how we can solve this using an image tag?

If we can't find a better way of doing this, we have to at least update the Thumbnail component documentation:

```
...
 *   e.g. <div class="oae-thumbnail icon-oae-user">
 *            <a href="${entityData.profilePath}" title="${entityData.displayName|encodeForHTMLAttribute}">
 *                <img src="/ui/img/dummy/profile-pic-john.png" alt="John Librarian"/>
 *                <i class="icon-oae-public"></i>
 *            </a>
 *        </div>
...
```

and explain how it handle non-square images, etc.