This is a new computer and a new install of 11.10. I've launched 'keyboard' from Dash and try to change a keystroke, but no cigar. Nothing happens.
This has happened ever since I installed 11.10 on my other computers as well (but those computers were upgrades from 10.10 with custom keystrokes).
Is there another way to change keyboard shortcuts that I'm not aware of?
I've noticed that with 12.04, all previous shortcuts that I set after upgrading were lost. Also, resetting the Unity plugin for Compiz also disrupts this.
But, I would recommend using the Compiz Config Settings Manager. You can install it by running this in Terminal:
sudo apt-get install compizconfig-settings-manager
These shortcuts seem to override those set in the actual Keyboard shortcuts in Ubuntu Settings, and those set in MyUnity and UbuntuTweak.
This might not be exactly what you need, but I figured that it would be worth a shot.