IE9 colspan bug

IE9

table 所有列colspan≧2,显示百分比有问题。需要加一行空行

<table>

  <col style="width:10%">

  <col style="width:10%">

  <col style="width:30%">

  <col style="width:10%">

  <col style="width:10%">

  <col style="width:30%">

  <tr>

    <td style="height:0px;padding:0px;"></td>

    <td style="height:0px;padding:0px;"></td>

    <td style="height:0px;padding:0px;"></td>

    <td style="height:0px;padding:0px;"></td>

    <td style="height:0px;padding:0px;"></td>

    <td style="height:0px;padding:0px;"></td>

  </tr>

  <tr>

    <td colspan=3>A</td>

    <td colspan=3>B</td>

  </tr>

</table>