<html>
<head>
<link rel="stylesheet" href="370525-style.css"/>
</head>

<body>
rowspan=2 and specified height on a sibling of the cell with percent-height div.
<table>
 <tr>
   <td style="background: lightgreen">
    <div style="height: 75%">
     height=75% / ignored
    </div>
    blah
   </td>
   <td  style="background: lightblue" height="200px"  rowspan="2">
    height=200px.
   </td>
 </tr>
 <tr>
   <td style="background: orange">
   2nd row, 1st column
   </td>
 </tr>
</table>
</body>
</html>