There is an issue when Pai Gow version 1.5.0 is used with iOS version 4.2. An updated version of Pai Gow version 1.5.1 is submitted to Apple. With this new version, the above-mentioned issue is fixed. Please update in about a week's time when Apple processes this change.
Version 1.5.5 is known to have issues on random shuffle. The fix is in Version 1.5.6 which will be available soon in App Store.