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?
- I deleted ~/.config, ~/.gnome2, ~/.compiz-1, ~/.icons and a dozen other such directories (obviously not recommended, but whatever...), restarted, and still no change. 
- I have a NVIDIA GeForce GT 430 and am using the "post release updates" provided by the Additional Drivers panel in System Settings. Maybe this is related? 
- Uninstalled the drivers mentioned, rebooted using whatever vanilla detection scheme Ubuntu has going on, no change. 
 
    
 
    