A glitch related to the unused-space-at-bottom thing: When I start the swipe-from-top gesture, the menu doesn't slide in smoothly; instead a part of the menu appears suddenly and only after that scrolls in neatly. Again, this happens only with <4 favourite ambiences. (In the screenshot, first thing I see of the menu with three ambiences.)

This problem (and the empty space at bottom) only occurs in portrait orientation. No problem in landscape.