Unity 4.2 IOS Exception Handling

Hey Folks,

I'm having trouble getting Unity to catch null pointer exceptions on IOS - even with explicit try/catch exceptions. Here's a rough sketch of my code

https://gist.github.com/jmcguirk/6553120

Each of these functions are called as a callback handler from a simple TK2dButton (Which is just a coroutine looking for input up).

In the editor, the errors are either uncaught (and logged to the console) or caught (and logged by my code).

Running this on device (IOS 6 on iphone, IOS 7 on ipad mini) produces the following hard crash

 #    Binary Image Name    Address    Symbol
 0    honorbound    0x00eced06    testflight_backtrace
 1    honorbound    0x00ecf954    TFSignalHandler
 2    libsystem_platform.dylib    0x3914d062    _sigtramp
 3    honorbound    0x00173d5f    m_11ba
 4    honorbound    0x00173d5f    m_11ba
 5    honorbound    0x00d6756b    m_4513
 6    honorbound    0x0142518f    mono_jit_runtime_invoke
 7    honorbound    0x014c71c7    mono_runtime_invoke
 8    honorbound    0x011819f3    scripting_method_invoke in ScriptingBackendApi_Mono.cpp on Line 176
 9    honorbound    0x011815e7    in ScriptingInvocationNoArgs.cpp on Line 94
 10    honorbound    0x011815a3    in ScriptingInvocationNoArgs.cpp on Line 78
 11    honorbound    0x011770c3    in MonoBehaviour.cpp on Line 533
 12    honorbound    0x011770db    in MonoBehaviour.cpp on Line 620
 13    honorbound    0x010b7973    in Behaviour.cpp on Line 178
 14    honorbound    0x010b7ccb    in Behaviour.cpp on Line 173
 15    honorbound    0x01154297    PlayerLoop in Player.cpp on Line 1853
 16    honorbound    0x00efb3c7    UnityPlayerLoop in LibEntryPoint.mm on Line 377
 17    honorbound    0x00ea9467    -[UnityAppController repaintDisplayLink] in UnityAppController.m

This is with Stripping Level "strip byte code" and Call Optimization set to "Slow and Safe"