I've just returned my air today. I believe the light bleeding got progressively worst with time and so did the shadow on the left side. The yellowing wasn't so bad but the shadow started getting this green tint to it. Basically, the color on the left side of my device was all messed up.
I haven't purchased again yet. I have noticed that on my local apple store, all the floor models are perfect. Proper, proper perfect!
No yellow tint, no shadow. Just beautiful even screens.
Now, what's curious about this is that a few weeks ago when they first arrived, the floor models were definitely tinted because I checked them out after my first exchanges.
I don't think that these screens settled because, as I see it, the yellow tinting is a problem with the way the glass is curated because as I turned the device and tried to look at it from different angles, I would get a whiter left side. Also, the shadow is definitely a problem with the way the light diffusing layers are applies, that is, in a rush and not properly aligned.
I think that by now, apple is definitely aware of the problem but further action will possibly depend on media exposure.
What to do, what to do...