Superb answer jhowell - Thanks, I can sleep now.
I have to admit that it came as a bit of a shock to see the screenshots from the iOS device when I'd been under the assumption that I'd been "doing it right all these years".
I suspect that there's no need to hobble this particular project for the sake of some older devices. I think we'll go with the attitude (it'll be true for this project at least - it concerns hiking up mountains and things) that if you're using this title then you're going to be going into things prepared with decent kit. Maybe a discrete disclaimer in the description and intro that formatting may be different on older devices to avoid negative reviews from anyone who walks off a cliff becuase some icons look s little shonky!