EXC_BAD_INSTRUCTION on start of app on Device, and no image on Simulator

Question

Hi,

I have the above mentioned problem, with an app wich used the AdMob SDK. I'm using latest SDK of AdMob, on 4.0.1 iOS SDK.

My problem consists of two parts:

In the Simulator, the app boots, and outputs through NSLog that an ad has been received, but the whole screen stays black (my UI is not showing)

On the Device, the app won't boot, with above mentioned error, and the stack is almost empty (none of my program code is visible on the stack, only initialization functions, like

#0  0x2fe01088 in __dyld__ZN13dyldbootstrapL30randomizeExecutableLoadAddressEPK12macho_headerPPKcPm

(latest called function on stack)

Where do I need to start looking?

Thanks! Yvan