If you've upgraded Drupal recently and noticed that the admin page is empty and returns a You do not have any administrative items error message, then this basically means that your menu table is a little wonky. Another tell-tale sign that you've got the same problem as I did is that the admin page will have the title, Administer rather than Administration. Fixing this is pretty straightforward, if a little painstaking. To do so, make sure that the Menu module is enabled and perform the following steps: