No dearth of troubles to iPhone 5 users. Seems users are complaining of purple flare effects in pics captured by the 5's camera. It can be the same effect photographers see in point to shoot cameras on highlights.
Image Source: Is Your iPhone 5 Camera Seeing Purple?

Gizmodo's editor-in-chief Joe Brown noticed this exact problem happening on his phone (as in image above).
So what has Apple got to say about this? Its not their fault. Its just that
You’re Holding It Wrong.
What they replied in their mail...
:O
have fun with your expensive phones guys. and if you find anything wrong with it, its your fault. You obviously do not know how to use it. /s
Image Source: Is Your iPhone 5 Camera Seeing Purple?

Gizmodo's editor-in-chief Joe Brown noticed this exact problem happening on his phone (as in image above).
So what has Apple got to say about this? Its not their fault. Its just that
You’re Holding It Wrong.
What they replied in their mail...
Source and more pics: Apple Acknowledges iPhone 5 Camera Problem, Says You're Holding It WrongDear Matt,
Our engineering team just gave me this information and we recommend that you angle the camera away from the bright light source when taking pictures. The purple flare in the image provided is considered normal behavior for iPhone 5's camera. If you wish to reach me regarding this case number *********, please contact me at 1-877-***-**** ext. *******. I currently work Thursday-Monday: 7:00am - 3:30pm Mountain Time. If you reach my voicemail, please leave your name, phone number, case number and the best time to reach you. Email is ***********@apple.com.
Sincerely,
Debby
AppleCare Support
:O
have fun with your expensive phones guys. and if you find anything wrong with it, its your fault. You obviously do not know how to use it. /s