I ran into a problem with the Leftmenu control caused all the menu items to be added repeatedly after each postback from a page control. I bulldoged the solution by modifing the leftmenu.ascx page with the folowing:
 

site\Website\admin\Skins\LeftMenu.ascx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
   Dim objTabController As New TabController
   Dim i, iItemIndex, iRootGroupId As Integer
   Dim temp As qElement
   Dim StartingItemId As Integer
            'This line added to prevent menu stacking
            If IsPostBack = True Then Exit Sub
            'end of mod

I'm sure this is not the way to do this, as it maybe handled in CSS, but I found no strait forward CSS builder documentation on the this control. Would anyone know what negetive effects this will have if I leave it in place and/or a better solution for fixing this problem?