I think it should show a message, even if fallbacking to Unity-QT, and in the two cases ( fallback to Gnome-panel or Unity-QT, ask the suer if he wants to show this message next time.)
I think it should show a message, even if fallbacking to Unity-QT, and in the two cases ( fallback to Gnome-panel or Unity-QT, ask the suer if he wants to show this message next time.)