Thanks, I got it exchanged yesterday and now have a Kobo Aura H2O with 5 lights which you can only see if you tilt it towards you. Is normal to have an afterimage of area you have pressed eg "see more"" sometimes?
I'm glad that I preserved through four exchanges to get one with a perfect exterior and a less yellow screen

What is Kobo's quality control like?!!:
PS Why does an advert appear in my post?
PPS Now it's gone!