title: dt.last-child not working
body: <p><a href="http://jsfiddle.net/sWVdH/2/" rel="nofollow">Here is a fiddle</a> where I'd like to remove the white <code>border:bottom</code> on the last child ('Headline Three').</p>
  
  <p>I tried the following CSS, but it didn't work.</p>
  
  <pre><code>#containerr  dt.last-child {
  border-bottom:none;
  }
  </code></pre>
  
  <p>Any idea what I'm doing wrong?</p>