.. If the app is – in or out of background - (if in background NOT the first app) and the  device locked – when you get a push message and DO NOT response straight away. Later  unlock, click the app icon (which will have a badge on it) and it fails.

.. If the app is – in or out of background - (if in background NOT the first app) and the  device locked – when you get a push message and DO NOT response straight away. let it fade off then, Later unlock, click the app icon (which will have a badge on it) and it fails to pop up my internal alert box and my notification message is gone(cannot get access to it in code).. other times it works . Including if you tap the messaeg from app centre. (this is all on a iPod 5.1.1).
Here is someone else with same problem http://stackoverflow.com/questions/7080266/receive-remote-notification-when-ios- device-is-locked-and-im-not-responding-imm

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