Height of brackets in MathML mfenced element

Hi, 
 
When I use the "mfenced" element of MathML to create a matrix that
extends over several lines vertically, the height of the brackets that
Amaya generates seems to be restricted to 3 lines. Is there some way I
can get the brackets to extend the full height of the matrix contents?
For example, the following MathML code is rendered with A,B,C,D,E
correctly positioned in a vertical line but with the brackets only
extending from the B to the D.
 
  <mfenced open="{" close="}">
    <mtable>
      <mtr><mtd><mi>A</mi></mtd></mtr>
      <mtr><mtd><mi>B</mi></mtd></mtr>
      <mtr><mtd><mi>C</mi></mtd></mtr>
      <mtr><mtd><mi>D</mi></mtd></mtr>
      <mtr><mtd><mi>E</mi></mtd></mtr>
    </mtable>
  </mfenced>
 
Regards,
Chris