mi_cmd_stack_list_frames: Not enough frames in stack.

I was getting this error in the console when trying to run an iOS app on a 3.x device. Turns out 4.1 frameworks were causing the problem. By weak linking some of the frameworks (targets - get info - linked libraries) I could get the app to run fine on 3.x

I needed to weak link UIKit.framework and AVFoundation.framework