How to alternate tabs in Linux GNOME terminal

I just tried this under Snow Leopard and it worked beautifully:

1. Open System Preferences => Keyboard
2. Go to Keyboard Shortcuts
3. Click on "Application Shortcuts" on the left
4. Click the little "+" to add a program
5. Navigate to Terminal (it's hidden in Applications/Utilities)
6. For the Menu Title type "Show Next Tab" or "Show Previous Tab" ("Select Next Tab" and "Select Previous Tab" for Mavericks or older) (Also, these items will be different for languages other than English.)
7. For the Keyboard Shortcut type Ctrl-Tab or Ctrl-Shift-Tab
8. Click Add. You are g2g!

Ditch Terminal and use iTerm. It lets you do this and is, to me anyway, a bit more useful.