Where are adobe team?
Are you using the same ipa file on different version of devices or did you update the device from 4.2.1 to 4.3.2 and then downgraded back to 4.2.1 to test it out? Also, wondering if you used the same certificate and provisioning file when published ipa file.
If possible, would you be able to send me the xml descriptor file as well as .fla/.as files? I can try them on my hand.
Please email them through mailto:FlashAuthBetaBugs@adobe.com. Please note that our filter system cannot accept .zip file. If you try to zip your fla, please change the file extension from .zip to .zzz.
Flash Authoring QE