App Submission OS 3.0 problem

Hi, I submit our first game to App Store, it was done with iTGB 1.2 compiled to 2.2.1, on 2.2.1 it works well, but we got message - Puzzle Rocks cannot be posted to the App Store because it is crashing on iPhone OS 3.0 and Mac OS X 10.5.7. Puzzle Rocks will crash upon start up. After the loading screen appears, the application will turn black on iPhone 3G.

So it's look like that iTGB 1.2 for 2.2.1, is not compatible with OS 3.0 - what we should do now? Any idea?

Exception Type:  EXC_BAD_ACCESS (SIGBUS)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000004