mopub/mopub-client — pull request #48 by pirateking (2012-03-25 10:31:30+00:00)
Title: iOS: Alternative to using UIDevice uniqueIdentifier for iOS 5

To address this issue: http://www.macrumors.com/2012/03/25/apple-begins-rejecting-apps-for-using-the-unique-device-identifier-udid/