Actually I've figured out how to tell the difference between the two (though an "ns_xml version" command would've made this task much simpler!) and am changing the code to make the proper call depending on whether or not the new form is supported.
You'll get one of those "ns_xml is old you oughtta update" messages you've seen if you've ever used a REALLY REALLY old version of ns_xml along with notification that the code works around the issue.
