JS Guru Needed: Weird YUI Menu Problem

[davide101]

I could really use advice from a seasoned Javascript programmer. I don't need a solution as much as guidances on how to debug this. Although if a solution jumps out at you, I would be thrilled.

Here's what's going on. I built a beautiful new site navigation banner based on the YUI menu module. On my test pages, the menus function flawlessly on the browsers I've tested with thus far (ie6, ie7, ff2).

When I implement the YUI Menu on my vBulletin pages, I run into the following problem. When I first hover over a parent, the submenu drops down and I can navigate it perfectly. About 20%of the time, if I move my mouse across multiple parents, the submenu pops up but disappears when I navigate to it. This behavior will continue until I click somewhere else on the document or wait a few seconds with my mouse away from the menus.

I know that vBulletin uses some YUI files. So I've ensured that the extra files I need to include are from the same version (2.5.0) and are called in the correct order. I get no Javascript errors on the page.

How do I go about troubleshooting this from here? If I'm not getting errors, is there any straightforward way to identify what might cause this problem? Or am I ****?

Working Page: http://www.diabetesdaily.com/index2.php
vBulletin Page: http://www.diabetesdaily.com/forum/index.php?styleid=35