Missing namespace nodes on the namespace axis

Jaxen is failing this test:

org.w3c.dom.Element root = doc.createElement("root");
doc.appendChild(root);
Element child = doc.createElementNS("http://www.example.org", "foo:child");
root.appendChild(child);

XPath xpath = new DOMXPath("//namespace::node()");
List result = xpath.selectNodes(doc);
assertEquals(3, result.size());

This query on this document should find three nodes: a namespace node for the xml prefix on the root, a namespace node for the xml prefix on the child, and a namespace node for the foo prefix on the child. It only finds the first two. (I've inspected this with the debugger.) For some reason it misses the foo prefix.

I haven't fully tracked this down yet. It might be a problem in the DOM navigator. It might be a problem in Jaxen itself.