As first reported by AppleInsider, Apple has begun restricting the use of special characters in app descriptions in the App Store. For now, Apple is restricting the checkmark, the explosion, the "no symbol" and the speech bubble. One can only hope that Apple will eventually add emoji faces to that list; some app descriptions have a decidedly unappealing "MySpace" feel.
The new iconography rules came into place on April 19th. While Apple did not specify a reason for the changes, it's easy to speculate the company wants a more uniform appearance in its App Store listings, instead of letting some developers using checkmarks as bullet points while others use, you know, real bullet points.