Why is it not possible to see which version is installed within the System Prefs pane? This is an imbecilic omission - how is one expected to know which version is installed and whether or not it is necessary to update a system without this? And it must be the most trivial of things to do - obviously the software knows which version it is, so writing some code to display this within the pref pane is a tiny amount of work. Come on, guys, have some simple common sense!