Да вы, вероятно, можете (это быть возможным, что проблема только появляется на устройстве, не в симуляторе).
To download the iOS 5 simulator (iPhone & iPad), go to the settings in Xcode, in the "Downloads" section, and install iOS 5.0 and/or iOS 5.1 simulators. Then select the appropriate simulator on the upper left corner of the main window of Xcode before running your app. Also make sure the deployment target of your app is set to iOS 5.0 (first item on the list of the left panel in the main window, select your target and in the "Summary" tab, set your deployment target).