Marco Arment regarding the recent kerfuffle over Apple’s rejection of iOS games that depict violence in their icon and/or screenshots:
The App Store has parental controls and requires all apps to bear age-appropriate content ratings. While violence, etc. has always been permitted in apps, Apple has always required that all app metadata — title, description, icon, and screenshots — be kid-proof with the lowest rating.
Apple has a tendency to be a little inconsistent with their application rejections, but this isn’t an example of that. As Marco points out, Apple’s rules about what isn’t allowed in application screenshots is very clear.