One problem was a crash when running my iOS app with the newly-integrated ExactTarget MobilePush iOS SDK. I kept getting this error:
Uncaught exception: *** setObjectForKey: object cannot be nil (key: app_version)
At first I thought this may have arisen because my app was yet to be provisioned by ExactTarget, and it was their code causing the error, and perhaps it might fix itself once I had received notification that I had been provisioned. Finally after a couple of days I received this notice, but alas the error persisted.
After more research I discovered that my app didn't have an Info.plist entry for "Bundle versions string, short" (or