I'm running the full development version of Modernizr on my site, and while html5shiv is included in Modernizr, it doesn't seem to be running. If I add html5shiv as a separate script to the page, everything works great. The rest of Modernizr is working fine, too. Do I have to initialize the html5shiv in Modernizr somehow? The docs make it seem like it automatically runs.

Here's the code at the head of my page:

```
<script src="/assets_site/js/head.load.min.js"></script>
<script>
  head.js(
    { modernizr: '/assets_site/js/modernizr.js' },
    { jquery: '//ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js' },
    { placeholder: '/assets_site/js/jquery.placeholder.min.js' },
    { response: '/assets_site/js/jquery.response.min.js' }
  );
</script>

```

And the separate html5shiv code that's been working where Modernizr hasn't:

```
<!--[if lt IE 9]>
  <script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->

```

Dumb question, but I'm rather puzzled. Thanks.