Looking at the iPhone SDK beta 4 API change log reveals that the following API calls have been removed from UIApplication.h: Removed -[UIApplication registerForRemoteNotificationsFromPublisher:] Removed -[UIApplication registeredRemoteNotificationPublishers] Removed -[UIApplication remoteNotificationSystemIdentifier] Removed -[UIApplication remoteNotificationsAreActive] Removed -[UIApplication unregisterForRemoteNotificationsFromPublisher:] Removed -[UIApplicationDelegate application:didReceiveRemoteNotificationFromPublisher:userInfo:] Removed UIApplication(UIRemoteNotifications) Also some properties have been removed from CLLocation: Removed CLLocation.course Removed CLLocation.speed Removed CLLocation.speedAvailable [...]