Nested SVGs aren't placed correctly?

[ygra]

struct-group-02-b SVG Test Suite test:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1 Basic//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11-basic.dtd"[]>
<svg version="1.1" baseProfile="basic" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="svg-root" width="480" height="360" viewBox="0 0 480 360">
  <g id="test-body-content">
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="lowerRight" x="240" y="180" width="240" height="180">
      <rect x="0" y="0" width="240" height="180" fill="red" />
    </svg>
    <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="upperRight" x="0" y="0" width="240" height="180">
      <rect fill="blue" x="0" y="0" width="240" height="180" />
      <svg version="1.1" baseProfile="basic" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="childArea" x="60" y="45" width="120" height="90">
        <rect fill="yellow" x="0" y="0" width="120" height="90" />
      </svg>
    </svg>
  </g>
  <text id="revision" x="10" y="340" font-size="40" stroke="none" fill="black">$Revision: 1.1 $</text>
  <rect id="test-frame" x="1" y="1" width="478" height="358" fill="none" stroke="#000000" />
</svg>