I think I will have to exchange my just bought Aura. The light is not even at all: it's clear almost bluish at the bottom of the screen and there is a big yellow patch on the top of the screen
Actually I don't know if my expectations are too high or if this specific Aura has a sub-par screen.
Edit: trying to add a picture, but I don't know how to put a miniature

The picture quality isn't that great, maybe it's hard to see the differences. People around me notice the shadow at the top too, but they have never seen a frontlit ereader before.