In my opinion it's obviously blue reflection caused by the cover + flash/certain lighting conditions.

However this is not a camera and it's not even a dedicated camera phone. I honestly don't care about this reflection nor about drawing a line on the cover.

I'd care a lot if nokia would finally quit separating market segments in multimedia/business/hacker/etc and stop cutting corners, eg. this is a hacker phone, not a camera phone.

I know economy 's a b**** and devices and ideas have to be feasible but a high end sensor would have been awesome but what's done is done and most of us didn't get N900 for the camera.

Fixing a small reflection or replacing the cover won't help as much as some more advanced post processing algorithms would.

This fixes it for me. Can't say anything until more of you are willing to try this - just take the cover off first.
Sorry for the blurry pic but you oughta get it by now.