Aperture (and probably the other pro tools) has yet another style (greyscale), actually, but that only reinforces your point. The various different teams within

Aperture (and probably the other pro tools) has yet another style (greyscale), actually, but that only reinforces your point. The various different teams within Apple seem to be pushing their UIs in wildly different directions recently. iTunes was one of the first with weird UI (the back button in the iTMS is horribly broken); iPhoto '11 behaves quite differently to iPhoto '09, and unlike any Apple app before it. Now the App Store.