I started working with my project after upgrading to Xcode 4.3.2 and Unity 3.5.2 and I'm having a really weird crash. When building and running I get this:

-> registered mono modules 0xd3f270      
 -[AppController applicationDidFinishLaunching:]: unrecognized selector sent to instance 0x1d53c10    
 Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[AppController applicationDidFinishLaunching:]: unrecognized selector sent to instance 0x1d53c10'

It looks like UIApplicationMain(argc, argv, nil, @"AppController"); is calling the deprecated :
-(void) applicationDidFinishLaunching:(UIApplication)application*

instead of:
- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

I verified this by copying the applicationDidFinishLaunching method from http://AppController.mm that I had in and old build and remmed out the didFinishLaunchingWithOptions method that was already there. The game launched and worked but having to hand edit the http://AppController.mm file makes me really nervous about what else might be wrong.

Does anybody have any clue what might be going on? This is a fairly mature project that had been working. I have the SDK set to the latest 5.1 and the target was set at 4.1 but I changed that to 4.3 to test (no difference).

Thanks,
Geoff