@NiLuJe: welcome back
... and to add a bit more to the stress, could you please take a look at this post
and the follow-ups? Bottom line is that there seems to be a B01F Paperwhite out there (japanese 3G model), which doesn't seem to be supported yet (though I didn't check as thoroughly as I should have, I'm just assuming that's the reason).
If so, could you please include support for that model, and release the binaries? That'd be very much appreciated... Thanks a ton!