SIGSEGV Running Monotouch on iOS6

We recently tried compiling our MonoTouch application for iOS6, and it invariably crashes about 5 seconds after pressing play in the main menu.

Here's the stack trace:

Stacktrace:
  at MonoTouch.ObjCRuntime.Runtime.ConstructNSObject (intptr,intptr) [0x00007] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:208
  at MonoTouch.ObjCRuntime.Runtime.GetNSObject (intptr) [0x0001f] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:259
  at MonoTouch.ObjCRuntime.Runtime.GetNSObjectWrapped (intptr) [0x00000] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:276
  at (wrapper native-to-managed) MonoTouch.ObjCRuntime.Runtime.GetNSObjectWrapped (intptr) <0xffffffff>
  at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38
  at Resistor5.Program.Main (string[]) [0x00000] in /Users/nullcandy/Projects/Resistor5/Resistor5_iOS/AppDelegate.cs:22
  at (wrapper runtime-invoke) object.runtime_invoke_dynamic (intptr,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

0   Resistor5_iOS                       0x011bf7b4 mono_handle_native_sigsegv + 280
1   Resistor5_iOS                       0x011a9380 mono_sigsegv_signal_handler + 268
2   libsystem_c.dylib                   0x31e17e93 _sigtramp + 42
3   ???                                 0x00000000 0x0 + 0
4   Resistor5_iOS                       0x0126191c single_arg_user_copy_or_mark + 28
5   Resistor5_iOS                       0x0128e4cc mark_tls_slots + 160
6   Resistor5_iOS                       0x012650f4 scan_from_registered_roots + 412
7   Resistor5_iOS                       0x01271c34 major_collection + 3040
8   Resistor5_iOS                       0x01272c98 minor_collect_or_expand_inner + 88
9   Resistor5_iOS                       0x012733a0 mono_gc_alloc_obj_nolock + 1336
10  Resistor5_iOS                       0x01262db0 mono_gc_alloc_vector + 136
11  Resistor5_iOS                       0x01249cf4 mono_array_new_specific + 132
12  Resistor5_iOS                       0x0108abb4 wrapper_managed_to_native_object___icall_wrapper_mono_array_new_specific_intptr_int + 68
13  Resistor5_iOS                       0x00088090 MonoTouch_ObjCRuntime_Runtime_GetNSObject_intptr + 144
14  Resistor5_iOS                       0x00088110 MonoTouch_ObjCRuntime_Runtime_GetNSObjectWrapped_intptr + 28
15  Resistor5_iOS                       0x000b8620 wrapper_native_to_managed_MonoTouch_ObjCRuntime_Runtime_GetNSObjectWrapped_intptr + 64
16  Resistor5_iOS                       0x012bd634 get_managed_object_for_ptr_fast + 108
17  Resistor5_iOS                       0x011a19f4 native_to_managed_trampoline_MonoTouch_UIKit_UIAccelerometer__UIAccelerometerDelegate_DidAccelerate + 324
18  UIKit                               0x35f16717 <redacted> + 222
19  UIKit                               0x35ca7359 <redacted> + 2820
20  UIKit                               0x35ca66d5 <redacted> + 72
21  UIKit                               0x35ca6123 <redacted> + 6154
22  GraphicsServices                    0x33f395a3 <redacted> + 590
23  GraphicsServices                    0x33f391d3 <redacted> + 34
24  CoreFoundation                      0x36311173 <redacted> + 34
25  CoreFoundation                      0x36311117 <redacted> + 138
26  CoreFoundation                      0x3630ff99 <redacted> + 1384
27  CoreFoundation                      0x36282ebd CFRunLoopRunSpecific + 356
28  CoreFoundation                      0x36282d49 CFRunLoopRunInMode + 104
29  GraphicsServices                    0x33f382eb GSEventRunModal + 74
30  UIKit                               0x35cfa301 UIApplicationMain + 1120
31  Resistor5_iOS                       0x000b769c wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 240
32  Resistor5_iOS                       0x0094d158 Resistor5_Program_Main_string__ + 152
33  Resistor5_iOS                       0x01085ce0 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 200
34  Resistor5_iOS                       0x011ab3dc mono_jit_runtime_invoke + 1644
35  Resistor5_iOS                       0x0124aa8c mono_runtime_invoke + 128
36  Resistor5_iOS                       0x0124ec84 mono_runtime_exec_main + 436
37  Resistor5_iOS                       0x0124f044 mono_runtime_run_main + 756
38  Resistor5_iOS                       0x011aff14 mono_jit_exec + 140
39  Resistor5_iOS                       0x012b7f88 main + 2028
40  Resistor5_iOS                       0x000020c4 start + 52

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries 
used by your application.
=================================================================

It works fine with iOS5. Any ideas?

P.S. Although the accelerometer is mentioned in the stacktrace, we're not using the accelerometer at any point in the code.

This looks like memory corruption - I suggest you file a bug report with a test case / your entire project.