CAttr::getSpecified() should return true.
 CAttr::getValue() and CElement::setAttributeNode() could crash if no children.
 CAttributesMap::*NS() methods ignored namespaceURI parameter.
 CDATASection::getNodeValue() forwarded to wrong base class.
 CDocument needs to override cloneNode().
 CDocument::importNode(), CDocumentBuilder::parseURI() deref null argument.
 CElement::getAttributes() should return an empty map.
 CElementList could be created for null element.
 CNode::insertBefore() did not set parent/children pointers.
 CNode::setPrefix() should only work on element/attribute.
 CXPathAPI had inverted check for null argument (xmlfix3 regression).