Camera on Droid 2, just being picky?

After swapping camera software to Vignette I was able to get better daytime images. Now I've noticed that even in raw mode (before the picture is taken) the center of the picture seems a different color. Is this a defect or am I being picky? the space around the center seems less sharp and less saturation than the middle of the picture.

I didn't know if this is a result of the curved lens.

EDIT (again) I looked at some Droid 1 pics they too showed more color in the center of the pic. Maybe the metering?






BEFORE switching to Vignette. TO ADD. BEFORE taking the picture it looked fine. After is when it looked like this. The above pics looked like this BEFORE and AFTER taking them.