Hi!
I'm probably too picky, but for the peace of mind (or not) need for help or comment on in my opinion
some light bleeding, actually a few darker areas on the bottom of the screen (don't think it is so-called "hello" effect on 820 and some 1000 models)
I saw some kind of this on various older lcd screens. It is more when a backlight is scaled down. On bright daylight and manual 100% light is almost. invisible.
On attached image backlight is on auto.
Does on your screens appear similar backlight situation, and should ask to return, or I am just too paranoid and it is a normal thing.