Tiger: XML 1.1 doc parsed in by DocumentBuilder is serialized as XML 1.0 doc

A XML 1.1 document is parsed with a DocumentBuilder.parse(), and the resulting Document is then serialized with the new org.w3c.dom.ls.DocumentLS saveXML() method. The serialized document is no longer an XML 1.1 document, that is the
resulting serialized doc has '<?xml version="1.0"?>' even though the original XML document that was parsed had '<?xml version="1.1" encoding="UTF-8"?>'.
Shouldn't the serialized document be identical to the parsed document?