Apple rejecting applications that access UDIDs
Reports coming out from TechCrunch and AppleInsider claim that Apple has started to reject applications which attempt the access a devices unique device identifier or UDID.
As part of a more stringent ruleset regarding customer privacy, application developers who previously made use of the UDID (aka the serial number the mobile network uses to identify mobile devices on its network), as a means of tracking customer.
By removing the feature, Apple effectively ends OS-wide user tracking and will force developers to create their own proprietary opt-in identification systems instead. The change seems to be in response to mounting concern over privacy issues from Congress and the public about what data application developers have access to.