How do I enable Global Menus and fix HUD (after upgrading to 12.04 from 10.04)?

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http://askubuntu.com – I upgraded from Ubuntu 10.04 LTS to 12.04 LTS. It's more or less working. But, Global Menus aren't working, and when I use HUD no results ever appear. (Example: I search for "F" (without the quotes)) and nothing is found in any application (Terminal, Home Folder,...) I already did: sudo apt-get install appmenu-gtk appmenu-gtk3 appmenu-qt Then restarted, but nothing. Any ideas? (HowTos)