<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<bindings xmlns="http://www.mozilla.org/xbl"><binding id="foo"><content><qqq><children xmlns="http://www.mozilla.org/xbl"/></qqq></content></binding></bindings>
<script type="text/javascript">
// <![CDATA[
function boom()
{
var s = document.getElementById("s");
var o = document.getAnonymousNodes(s)[0];
(document.body).appendChild(s);
o.appendChild(document.createTextNode("F"));
}
// ]]>
</script>
</head>
<body onload="boom();"><span id="s" style="-moz-binding: url(#foo)"></span></body>
</html>