title: CSS2 Selectors not working on IE8
body: <p>Does anyone know why the following CSS code is not working on IE8, and yet it's working on EVERY OTHER browser?</p>
  
  <pre><code>table.wrap tr:first-child td, table.wrap tr:last-child td { height:20px; }
  table.wrap td:first-child, table.wrap td:last-child { width: 20px; }
  </code></pre>
  
  <p>I understand that IE8 does not support CSS3 features. But I don't think I'm using CSS3 here.</p>
  
  <p>I sincerely appreciate your help.</p>
  
  <p>Thank you so much!</p>