Alt-Tab windows switching groups windows in Ubuntu 12.10. How to disable?

  sudo apt-get install compiz-plugins compizconfig-settings-manager

1. Disable the keyboard shortcuts for Unity's switcher by unchecking CompizConfig Settings Manager ▸ Desktop ▸ Ubuntu Unity Plugin ▸ Switcher ▸ Key to start the switcher ▸ Enabled and Key to start the switcher in reverse ▸ Enabled
2. Enable the Static Application Switcher by checking CompizConfig Settings Manager ▸ Window Management ▸ Static Application Switcher ▸ Enable Static Application Switcher