<f:block>..</f:block> generates <tr><td colspan="3">...</td></tr>.

    ...
    </td></tr>
    <br /><br />
    <tr><td colspan="3">
    ... 

is not correct HTML, so changed to 

    ...
    </td></tr>
    <tr><td>
      <br /><br />
    </td></tr>
    <tr><td colspan="3">
    ...