<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<bindings xmlns="http://www.mozilla.org/xbl" xmlns:html="http://www.w3.org/1999/xhtml">
<binding id="foo">
<content><html:span>a b<children xmlns="http://www.mozilla.org/xbl"/></html:span></content>
</binding>
</bindings>
<script type="text/javascript">
function boom()
{
var cap = document.getElementById("cap");
var lsep = document.createTextNode("\u2028"); // U+2028 LINE SEPARATOR
cap.insertBefore(lsep, cap.firstChild);
}
</script>
</head>
<body onload="boom();"><caption id="cap" style="-moz-binding: url('#foo');"> </caption></body>
</html>