There’s a wonderful analysis by Secure Computing of the way an image in the Victoria’s Secret catalogue was tastefully PhotoShopped, probably by a graphic artist as a routine job. There’s nothing really sinister in the story (a missing handbag, eyes and teeth enhanced, a nipple removed). It’s really just a fascinating forensic analysis of how you can detect PhotoShopped alterations if you know how.
There’s good news and bad news here. On the one hand, the case study provides a cautionary tale about how untrustworthy digital images have become; on the other, it shows how someone with the right tools and forensic skills can detect alterations.