I got my iPad 4 yesterday as an upgrade from my 1st, the screen is great, when it is square in front of my eyes, at any angle it seems to have a green tint to it, even to the extreme that when I rested it on my knee and it fell to a slant, one half was green and the other a nice pure white. Is this normal for the new ipad and the technology the display it uses, I thought the point of IPS was to create a wide viewing angle.