WebKit/Blink can create `li` in `li`

Here's how it happens. Start with:

```
<ul>
    <li>
        foo
        <ul>
            <li>
                bar
            </li>
        </ul>
        baz
    </li>
</ul>
```

(which is totally legit) and put the caret right before 'baz'.

Now, press your favorite enter key and viola! You get an outrageous

```
<ul>
    <li>
        foo
        <ul>
            <li>
                bar
            </li>
        </ul>
        <li>
            <br />
        </li>
        baz
    </li>
</ul>
```

Other engines don't get hit.
Have you evaluated YUI? jQuery and YUI don't serve the same purpose.. It feels like you're suggesting that we should replace Django's ORM with Ruby on Rails.