<html xmlns="http://www.w3.org/1999/xhtml" style="-moz-binding: url(#foo)">
<head>
<xbl:bindings xmlns:xbl="http://www.mozilla.org/xbl">
<xbl:binding id="foo"><xbl:content><fieldset><xbl:children/></fieldset></xbl:content></xbl:binding>
</xbl:bindings>
<script type="text/javascript">
function boom()
{
var dE = document.documentElement;
var leg = document.createElementNS("http://www.w3.org/1999/xhtml", "legend");
leg.style.position = "absolute";
dE.appendChild(leg);
document.documentElement.offsetHeight;
dE.removeChild(leg);
}
</script>
</head>
<body onload="boom();"></body>
</html>