[Ripplinger]

It's normal for front-lit screens around the LEDs at the bottom. Remember this isn't a backlit screen like on your phone or tablets, etc., there are differences.

The first pic you had posted that showed the entire screen didn't show the slightly darker cone areas as pronounced; this newer image that you changed with the edit looks like the contrast was increased to show the differences more.

The first image seemed perfectly fine and not out of the ordinary at all. It's certainly much more even lighting than if you were reading by an exterior light or clip-on light and shouldn't be distracting at all.

If you're expecting perfectly even white across 100% of the screen, it's probably not ever going to happen on a front-lit screen.

Edit: When I enlarged the present screenshot, it looks like you have a stuck pixel along the top left edge. It's possible it's a speck of dust too, only you can tell by checking the screen. If it's a stuck pixel, that would certainly bother me and make me return it.

The slight shading around the LEDs though would not bother me at all, especially if they're more in line with the first pic posted.