iOS app rejected 2.1

Hi,

the app that was in review at the App Store was rejected by the App Store Team due to "2.1: Apps that crash will be rejected. We found that your app crashed on launch on iPad running iOS 6.0.1." However the device and iOS version that I use are the same and putting it on Mac's iTunes without using Xcode it works totally fine, no crash at all. (Using Xcode 4.5.2 and Unity 3.5.6f4)

Anyone had any similar experience and has an idea how to work it out?

Thanks, David

EDIT:

Using Analyze I get twice "Potential leak of an object stored into 'aStr;"' and one time "Value stored to 'poo' during its initialization is never read".

Using Profile or Analyze there is also "Validate Project Settings": Remove Obsolete Build Settings (PREBINDING) and Upgrade to latest Project Format (from Xcode 3.1-compatible format to 3.2-compatible) - not sure if this changes should be performed as I do not wanna risk getting after that additional issues.

Any advice on the things stated above? Thanks!