ios4 - iPhone app has issues only if 3GS users upgrade in iTunes? -


an upgrade app went live in itunes. 3gs iphones seem having issue if 3gs did upgrade of app. if 3gs iphone fresh download or deletes app , downloads it, fine.

i'm wondering if have missed coding perspective should have prevented issue?

i used several 3gs iphone testers. same 3gs iphones tested adhoc fine, have upgrade issue. iphone 4s have no issues whether downloads new or upgrades.

is there chance upgrade not replacing previous version of there app?

is there xcode setting ensure such thing?

or kind of fluke?

i have upgraded other apps in past similar functionality , had no issues.

did had breaking changes in app data formats? if remember correctly, itunes upgrades backup app data on device , restores after upgrade.


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