[BionicGecko]

I just received mine and it seems even worse than in the video nraudigy2 posted above. It was an open box so I suspect that was the reason it was returned.

I attach a couple of pics; pictures don't do justice to what it looks like in real life, but to make it easier to see, I flipped horizontally the bottom half of the first picture and vertically the right side of the second picture to highlight the difference.

EDIT: I returned it and had the chance to look at two more units; it seems to be a widespread problem. The unit which had the most even lighting also had a yellower tinge, which was was somehow "hiding" the issue (the gradient from yellow to a yellower tint of white is harder to see).

Overall it does look like such a lighting gradient is to be expected on the Libra Colour. I heard that Kobo was normally pretty good at producing uniform screens, so perhaps they will fix this in the next iteration.