isChildNode needs extra check for onMouseEnter

Where's the patch?

Anyway, this is probably already the case in trunk. Can you check it?

There is indeed at least one error in MochiKit.DOM.isChildNode. It fails with any DOM node that isn't an element, such as text DOM nodes. Here is a test case for test_MochiKit-DOM.html:

ok( isChildNode($('child').firstChild, 'parentTwo'), "isChildNode text node");

I think the fix for this issue is to skip the whole tagname checking:

--- MochiKit/DOM.js     (revision 1327)
+++ MochiKit/DOM.js     (working copy)
@@ -355,20 +355,15 @@
         if (typeof(maybeparent) == "string") {
             maybeparent = self.getElement(maybeparent);
         }
-        if (typeof(node) == 'undefined' || node === null || node === self._document) {
+        if (typeof(node) == 'undefined' || node === null) {
             return false;
         }
-        do {
+        while (node !== self._document) {
             if (node === maybeparent) {
                 return true;
             }
-            var tagName = node.tagName;
             node = node.parentNode;
-            if (!tagName) {
-                break;
-            }
-            tagName = tagName.toUpperCase();
-        } while (tagName != "BODY" && tagName != "HTML");
+        }
         return false;
     },

Perhaps Bob knows why we are checking for HTML and BODY tags? Something to do with frames or IFRAME:s?

I just committed the changes to isChildNode(). Could you please check if this problem persists?

Closing this issue due to lack of feedback. Issue probably resolved with latest changes to isChildNode().