My replacement has arrived today and it is not any better. The first thing I noticed was a speck of dust inside the screen above the pixels layer, clearly visible on a white screen (Google page). Then I've put the brightness to maximum and tried to count (!) the stuck pixels in a dark room... I have given up soon as I have at least 10-15 of them. When gently tilting around the screen it looks like the starry sky. At least none of them are too bright so might not interfere for most with daily use.

The trouble is that £500 is too much money for my perfectionist self to accept such mistakes. I have 14 working days to decide what to do though.

I'll look around on the market for alternatives in the meantime. It's really sad, I liked my 770 and N800 but it seems I have to move on.