Comment 44 for bug 927952

The behaviour didn't regress, the desktop team just decided to stop spending time changing GNOME behaviour and to focus on Unity which is our default desktop, we changed the behaviour only for Unity there.

 It's also something most GNOME users asked us to do, let the GNOME session be a real GNOME session and not an Ubuntu one.

@David: you decided to use GNOME fallback you get GNOME fallback, if you are unhappy about GNOME design choices you should open a bug on bugzilla.gnome.org to tell them about it