Hi everyone. I wonder how to set shortcuts for effects in kwin in kde 4.2? When I go to Configure Desktop->Desktop->Desktop Effects->All Efects and select Desktop Cube for instance, when trying to set the shortcut key lets say letter "u" at the bottom window, it says "The shortcut 'U' conflicts with the following key combinations:" It conflicts with nothing?! It doesn't help if I select any other letter or key combination, what am I missing here ,thanks for your help.