I have the same problem.. not so extreme.. but on the back, it's definitely going towards the matte finish turning weird and spotty. I use it in the case most of the time.. and I remove it only to clean the dust and wipe it. I live in a very hot climate as well.. and now, those spots on my phone are not going away at all. They are not oil spills or stuff like that.. the polycarbonate's finish really is wearing off. Also, I think the case is scratching the front edges of the phone every time you take it off or try to put it on.. because the case is so tight. There are permanent scratches on the phone now. My N8 is with me for 2 years and it still doesn't have a single scratch on its freakin' strong body. (and I dropped it many times on the floor in front of iFags to win challenges saying they can't do the same with their phones )

Gonna keep it in my case the whole time.. damn, I really wanted to show it off around without the case.

Thinking of buying the glossy white housing and replacing it.. but too expensive.