I am trying to set my Push-to-Talk key to "End" in the audio settings. I push the "End" key (above the arrow keys) on my keyboard then hit the Apply/OK button. Afterwards, that key will not activate PTT mode. When I go back into the settings dialog, it will have changed to "Num 1". I assume this is because the Numpad 1 key can be used as "End" when numlock is turned off, but I have numlock on and am not pressing the Numpad 1 key when I am setting the key to use for PTT. The same also happens when I try to use the "Home" key. (It will change to "Num 7" instead.)