User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008092515 Ubuntu/8.10 (intrepid) Firefox/3.0.3 Build Identifier: It's very easy to trigger group by sort if one keeps their fingers on the home row, a simple press of the G key invokes it. However, without using the mouse to go to the menu to make it "unthreaded", it seems there's no easy keyboard way to uninvoke it. One would think that one should be able to just press "G" again, but it doesn't do that right now. Reproducible: Always Steps to Reproduce: 1. press G key to invoke "group by sort" 2. try to undo without going into menu structure.