So I realize that many people have noticed this issue with Galaxy S phones, and it seemingly has to do with AMOLED screens, but for those of you who haven't heard or noticed...
I was playing with some setting options late last night in bed, and realized some blacker-than-normal smears on the black settings menu pages. After some quick searching I found it was a common issue, and after taking a picture with my camera lens totally covered, and then looking at the picture, it was very clear that there are many long streaks and some dots as well where the screen has these much darker black spots burned into the screen.
Now it is certainly nothing I am worrying about that much, since you absolutely can not notice them besides on very dark screens in a very dark room... but my question is what causes this? Because at the very bottom of my screen there is a very large area that this blackness covers, along with some stray lines maybe 1+mm thick that look drawn, almost.
I don't expect anyone to have a solution, but I'm just looking for a cause so I can potentially avoid making any more of these marks. It may be purely uncontrollable and is just a problem with Amoled technology (which you would have hoped they would have fixed by now), but I wanted to mention it either way.