title: <hr> not showing
body: <p>I have a <code>&lt;hr&gt;</code> which isn't showing.</p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;div id="line"&gt;&lt;hr /&gt;&lt;/div&gt;
  </code></pre>
  
  <p>CSS:</p>
  
  <pre><code>hr {
      border: 0;
      width: 96%;
      color: #FFFF00;
      height: 1px;
  }
  
  
  #line {
      float: left;
      width: 731px;
      height: 10px;
  }
  </code></pre>
  
  <p>Any ideas why it's not showing?</p>