I didn't notice it until I got down to reading in the bedroom, but mine also has lighting issues. In my normal reading light, it is blueish at the bottom and beigeish at the top.
I think I'm returning it anyway because the right page turn press is not right. The left one works fine, but the right one barely registers a feedback and is hit or miss unless I hit it just perfect. Does anyone else have page press issues?
I may not replace it because my PW2 has a splendid screen and the page turn press buttons aren't all that I hoped for. I'm thinking they may not work well once the KV is in a case.
If anyone wants my opinion, I would say the KV would be a great upgrade for anyone who has a PW1, but maybe not so much if you have a good PW2.
Edited to add: And I know this probably sounds silly, but I like the way the PW screen feels better. I like that kind of papery feel it has.