Been looking around and can't see to find any information on how to enable alt+right click for window resize?
edit
My mistake
Running Unity 12.04, I am logged in under failsafe graphics mode as i can't get my 590GX Nvidida card to boot up without being in safe, but thats another problem.
Currently, my alt+click works and i can drag windows around.
But i can't currently, alt+right-click to resize.