:last-child is not being recognized
<p>I have a scroll to function that I need to execute to scroll to the last message in its container, which is the container with chunk_id. The problem is that it works as is for going to the container, but if I add last-child into the mix the function does not work. Any ideas what I am doing wrong?</p>

<p><strong>Works</strong></p>

<pre><code>$.scrollTo('div[chunk_id="'+autoscroll+'"]', 800, {easing:'elasout',offset:-250} );
</code></pre>

<p><strong>Does not</strong></p>

<pre><code>$.scrollTo('div[chunk_id="'+autoscroll+'"]:last-child', 800, {easing:'elasout',offset:-250} );
</code></pre>
