Global navigation not working after SP 2010 upgrade from MOSS

Question

We are upgrading a MOSS site to SP2010, using in-place upgrade and keeping the MOSS UI.
The in-place upgrade seems to have worked well and most of our work is coming over pretty well.
The one immediate exception is that the global navigation is not showing its drop-downs.  I can hover over a global nav item and click it and get to the page.  However, it won't show the options underneath the global nav.
Has anyone seen this before?
[Update: The global nav works the way we expect when we're on an application page, such as _layouts/viewlsts.aspx.  This clearly points to an issue with the master page or page layout itself (though prob the master page since there are 3 diff
page layouts and all show the same behavior.] 
--Paul Galvin, Computer Generated Solutions (CGS)
  Microsoft MVP - SharePoint
  Blogging @ http://www.mstechblogs.com/paul
  Twitter @ http://www.twitter.com/pagalvin

Answer 1

Hello Paul Gavin,
If I understand your issue properly then what you see is by design.  However there is a workaround, first please backup get yourself a backup (just inc ase).  The follow these steps:
1.      
Open the page in SPD and look for the following code, and delete it:
<style type="text/css">
body #s4-leftpanel {
        display:none;
.s4-ca {
        margin-left:0px;
</style>
2.      
Look for the following line and delete it:
<asp:Content ContentPlaceHolderId="PlaceHolderLeftNavBar" runat="server"></asp:Content>
Hope this helps, post back.
Chris Weaver
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