Table layout bug

Firefox 17.0
Camino 2.1.2
Opera 12.11
Chrome 24
Safari 6.0.2
Internet Explorer 8
Sleipnir 3.8.3
Internet Explorer 9

This illustrates a table layout bug which presents in a number of browsers. To the right you'll see how the table renders in various browsers. Here's the table in your browser:

Spanning header Third column Fourth column
  Indented entry Fourth column

Here's the markup for the table:

  <table border=1>
      <tr>
          <td colspan=2 nowrap>Spanning header</td>
          <td>Third column</td>
          <td>Fourth column</td>
      </tr>
      <tr>
          <td width=25> </td>
          <td colspan=2>Indented entry</td>
          <td>Fourth column</td>
      </tr>
  </table>