Having a Kindle Voyage (Wi-Fi+3G bought in europe if it matters) it seems that the resolution of 1080x1440 is wrong. At least for me. I resolved another resolution via Javascript w/in the browser and got 1072x1448 instead.
I've changed the KV profile in KCC to the new resolution and it looks just fine.
Here some shots I took:
http://imgur.com/a/JRPt3