Hey!

Sometimes it happens your Drupal 7 administration menu gets scrambled. This may be caused by some nasty modules, or like in my case it was inherited from MySQL crash in Drupal 6 version of a site.

Of course you can use Devel module which has a menu rebuild link in its block. But if you don't have Devel module installed, don't worry, it is easy and safe enough to fix menu manually in Drupal 7: