Amaya bug? overlapping Image map areas

Hi,

In HTML 4.01 recommendation it is said that overlapping areas
are possible. According to the recommendation, clicking in
the center of the circle of this example shall not active the link:

<map name="map">
  <area shape="circle" coords="100,100,50" alt="Inner-ring" />
  <area xmlns:xlink="http://www.w3.org/1999/xlink" shape="circle"
  coords="100,100,100" alt="Outer-ring" href="#out_of_here" />
</map>

Mozilla and Internet Explorer work as expected, but Amaya does not.

Amaya behaves as expected (circle center not active) when the code is:

<map name="map">
  <area xmlns:xlink="http://www.w3.org/1999/xlink" shape="circle"
  coords="100,100,100" alt="Outer-ring" href="#out_of_here" />
  <area shape="circle" coords="100,100,50" alt="Inner-ring" />
</map>

that is, when the inner circle <area> is after the outer one.
But then the whole circle is active in Mozilla and Internet Explorer.

Amaya seems to analyse and aplly <area> in opposite order than 
Mozilla or IE.

Best regards,
Bartolomé Sintes