How to diagnose an app that crashes on device but not sim

An app I’m developing keeps crashing on the idevice but is fine in the sim.

I’ve hooked up xcode organizer / console and I can see the following in the console:

[bash]
Wed Dec 22 09:25:29 LGs-iPad ReportCrash[1062] : Formulating crash report for process trunk-debug[1061]
Wed Dec 22 09:25:30 LGs-iPad ReportCrash[1062] : Saved crashreport to /var/mobile/Library/Logs/CrashReporter/trunk-debug_2010-12-22-092529_LGs-iPad.plist using uid: 0 gid: 0, synthetic_euid: 501 egid: 0
Wed Dec 22 09:25:30 LGs-iPad com.apple.launchd[1] (UIKitApplication:trunk-debug[0x6332][1061]) : (UIKitApplication:trunk-debug[0x6332]) Job appears to have crashed: Segmentation fault
Wed Dec 22 09:25:30 LGs-iPad SpringBoard[27] : Application ‘Framework’ exited abnormally with signal 11: Segmentation fault
[/bash]

I can then go look at the crash report but I can’t make any sense of it.

What can I do to progress this? - any ideas welcome [import]uid: 8353 topic_id: 4659 reply_id: 304659[/import]