I have noticed this isue with Google Chrome & IE8 and the fix that is implied in the articles does not sem to fix the bug in question, namely the sub menus do not show on the menu screen in the Wrox United website.

You can see this is the case by pointing either newer browser to www.wroxunited.net. In Firefox and IE7 & before this is not an issue.

Ive followed the article and now my corresponding
<DynamicMenuStyleCssClass="dynamicMenu"/> looks like
.dynamicMenu {
background-color:#a83930;
border-color: #fdea12;
border-style: solid;
border-width: 1px;
z-index: 1000;
}

Hoever after these changes the navigation does not seem to be fixed. Any ideas on this one anybody ?

The fix seems to work for one page only History.aspx, which has a slightly different navigation menu