It appears that the new 4.4 version of AP Mobile may be having some problems with iOS 4.3.3 that was released almost simultaneously. Since location cache is apparently now deleted by the OS you may need to sync your device with iTunes to re-verify the user account. We apologize for the inconvenience but this issue just started hitting the discussion boards and appears not to be limited to AP Mobile. We are investigating further and will issue a hot fix as necessary.
Users have reported that uninstalling and reinstalling the app seems to do the trick. Also, please email us at firstname.lastname@example.org with any information that will help us to fix the issue.
– AP Mobile