The only problem with it I have seen so far is that when loading say any picture the submenu's all collapse and are visible at once, then after it finishes loading they disappear and only the mouseover one remains.
I went back today and tested just the original version (http://www.dhtmlgoodies.com/index.html? ... es_tabmenu) and am getting the same results. Is there a way to stop the 'flash' persay while loading a page? I know with a frame it's doable but I really don't want to go down that road lol.