I didn't have this camera issue when I first bought 920, or maybe I didn't notice. I'm going to Nokia care tomorrow but AFAIK, Phones aren't replaced in India but repaired :\
I don't see anything weird with it?
The blue tinge? Pretty normal with smartphones (or with the iphone 5 its a purple tinge i believe)
Happens when you take photo of something flat and white (paper, wall, ect)