This one has always confused me. And then, to be even more confusing, if you start sliding up slowly, the background does not disappear. It stays this time around. Pull down slowly, no background, just the glass effect. Pull up slowly, still have the background, no glass effect. I guess I don't necessarily hate it, it's more of a neutral thing, but who is deciding these strange things??
In this case, the behavior is so weird and easy to trigger that I'm sure someone has filed a radar by now. So somebody has at least written a post-hoc justification?
