GR, the ExpandDepth property set to 0 will surpress the submenus on everything EXCEPT the active tab.  It doesn't seeem to work across the entire menu at all:

        <dnn:NAV runat="server" id="dnnNAV"
                ProviderName="DNNMenuNavigationProvider"
                IndicateChildren="false"
                ControlOrientation="Horizontal"
                CSSNodeRoot="main_dnnmenu_rootitem"
                CSSNodeHoverRoot="main_dnnmenu_rootitem_hover"
                CSSNodeSelectedRoot="main_dnnmenu_rootitem_selected"
                CSSBreadCrumbRoot="main_dnnmenu_rootitem_selected"
                CSSContainerSub="main_dnnmenu_submenu"
                CSSNodeHoverSub="main_dnnmenu_itemhover"
                CSSNodeSelectedSub="main_dnnmenu_itemselected"
                CSSContainerRoot="main_dnnmenu_container"
                CSSControl="main_dnnmenu_bar"
                CSSBreak="main_dnnmenu_break"
                Level="Root"
                ExpandDepth="0">
           <CustomAttributes>
                <dnn:CustomAttribute Name="RenderMode" Value="UnorderedList" />
           </CustomAttributes>   
           </dnn:NAV>

Just to see if I could find a bug I started looking at the nav.ascx.vb code.  I can't find any property settings for ExpandLevel but I did find this:

                'Dim blnRootOnly As Boolean = Boolean.Parse(GetValue(RootOnly, "False"))                'This setting determines if the submenu will be shown

Trouble is that it's comment out.  What is going on here?  Is this new menu ready for production?