It seems as if I've been reading many posts on iphone 4 accessories and many, if not almost all of them have an effect on flash. Even on cases that have an opening for both the backward facing camera and rear flash, there is still degradation in the quality of the pictures when used with flash. Do you all have accessories with absolutely no effect on flash? I'm starting to wonder if apple designed the glass back to have some kind of function along with the flash. Maybe the flash is reflected more because of the reflective index of the specific glass they use? Just wondering your thoughts everyone!