--- a/xml/ReSpec.js/js/respec.js	Mon Oct 29 20:53:32 2012 -0600
+++ b/xml/ReSpec.js/js/respec.js	Mon Oct 29 22:35:33 2012 -0700
@@ -1186,6 +1186,7 @@
                 isIntro = sn.hasClass(sec, "introductory");
             if (!sec.childNodes.length) continue;
             var h = sec.firstElementChild;
+            if (!h) continue;
             var ln = h.localName.toLowerCase();
             if (ln != "h2" && ln != "h3" && ln != "h4" && ln != "h5" && ln != "h6") continue;
             var title = h.textContent;