[MonoTouch] SIGSEGV Error when tapping a button?

[dermotos]

I have a UITableView. In the first section of this I have a custom
UITableViewCell. This cell is loaded from EditorTableCell.xib which was
created as a View & View Controller in monodevelop, then the view removed in
Interface Editor and replaced with a UITableViewCell. The view outlet is
set. I have added 3 items: a text field, and two UIButtons. When I press one
of the buttons, it executes the below code:

partial void onBtnImageTouchUpInside (NSObject sender)
		{

			var actionSheet = new UIActionSheet("") { "Take Photo", "Choose Photo",
"Cancel"} ;
			actionSheet.Style = UIActionSheetStyle.BlackTranslucent;
			actionSheet.CancelButtonIndex = 2;
			actionSheet.ShowInView(ContainingViewControllerReference.View);
			 
			picker = new UIImagePickerController();
			picker.Delegate = new PickerDelegate(this);
			
		
if(UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front)
||
			  
UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Rear))
			{  //At least one camera device is available:
				actionSheet.Clicked += delegate(object sender2, UIButtonEventArgs e2) {
					switch(e2.ButtonIndex)
					{
					case 0: //Take photo with camera:
						picker.SourceType = UIImagePickerControllerSourceType.Camera;
						
						//Switch to front camera if one is available:
					
if(UIImagePickerController.IsCameraDeviceAvailable(UIImagePickerControllerCameraDevice.Front))
							picker.CameraDevice = UIImagePickerControllerCameraDevice.Front;
						else
							picker.CameraDevice = UIImagePickerControllerCameraDevice.Rear;
						picker.CameraCaptureMode =
UIImagePickerControllerCameraCaptureMode.Photo;
						picker.AllowsEditing = true;
					
ContainingViewControllerReference.PresentModalViewController(picker,true);
						
						break;
						
						
					case 1: //Choose from photo library:
						picker.SourceType = UIImagePickerControllerSourceType.PhotoLibrary;
						picker.AllowsEditing = true;
						//picker.CameraCaptureMode =
UIImagePickerControllerCameraCaptureMode.Photo;
						//string[] available =
UIImagePickerController.AvailableMediaTypes(UIImagePickerControllerSourceType.PhotoLibrary);
					
ContainingViewControllerReference.PresentModalViewController(picker,true);
						
						break;
						
					case 2:
						//Cancelled
						break;
					}
					
					
				} ;
			}
			else //No camera device available (Touch, iPad 1 etc...)
			{
				picker.SourceType = UIImagePickerControllerSourceType.PhotoLibrary;
				picker.AllowsEditing = true;
			
ContainingViewControllerReference.PresentModalViewController(picker,true);
				
	 
			}
		}

Now, this ONLY works if I put a breakpoint around the start of the above
method. If it runs through without a breakpoint, I hit the below error:

  at MonoTouch.UIKit.UIApplication.Main (string[],string,string) <0x0010f>
  at MonoTouch.UIKit.UIApplication.Main (string[]) <0x00023>
  at ApolloApp.Application.Main (string[]) [0x00000] in
/Users/Dermot/Projects/Apollo/Apollo/Main.cs:15
  at (wrapper runtime-invoke) object.runtime_invoke_dynamic
(intptr,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

	0   Apollo                              0x00688e18
mono_handle_native_sigsegv + 456
	1   Apollo                              0x0066e7e4
mono_sigsegv_signal_handler + 428
	2   libsystem_c.dylib                   0x32c00539 _sigtramp + 48
	3   UIKit                               0x371d59eb -[UIApplication
sendAction:to:from:forEvent:] + 62
	4   UIKit                               0x371d59a7 -[UIApplication
sendAction:toTarget:fromSender:forEvent:] + 30
	5   UIKit                               0x371d5985 -[UIControl
sendAction:to:forEvent:] + 44
	6   UIKit                               0x371d56f5 -[UIControl(Internal)
_sendActionsForEvents:withEvent:] + 492
	7   UIKit                               0x371d602d -[UIControl
touchesEnded:withEvent:] + 476
	8   UIKit                               0x371d450f -[UIWindow
_sendTouchesForEvent:] + 318
	9   UIKit                               0x371d3f01 -[UIWindow sendEvent:] +
380
	10  UIKit                               0x371ba4ed -[UIApplication
sendEvent:] + 356
	11  UIKit                               0x371b9d2d
_UIApplicationHandleEvent + 5808
	12  GraphicsServices                    0x305ecdf3 PurpleEventCallback +
882
	13  CoreFoundation                      0x33de5553
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
	14  CoreFoundation                      0x33de54f5 __CFRunLoopDoSource1 +
140
	15  CoreFoundation                      0x33de4343 __CFRunLoopRun + 1370
	16  CoreFoundation                      0x33d674dd CFRunLoopRunSpecific +
300
	17  CoreFoundation                      0x33d673a5 CFRunLoopRunInMode + 104
	18  GraphicsServices                    0x305ebfcd GSEventRunModal + 156
	19  UIKit                               0x371e8743 UIApplicationMain + 1090
	20  Apollo                              0x00233764
wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr
+ 240
	21  Apollo                              0x00205ca8
MonoTouch_UIKit_UIApplication_Main_string__ + 36
	22  Apollo                              0x000e0648
ApolloApp_Application_Main_string__ + 128
	23  Apollo                              0x0044fe64
wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
+ 200
	24  Apollo                              0x0066e408 mono_jit_runtime_invoke
+ 2892
	25  Apollo                              0x00766714 mono_runtime_invoke +
200
	26  Apollo                              0x0076983c mono_runtime_exec_main +
836
	27  Apollo                              0x0076883c mono_runtime_run_main +
968
	28  Apollo                              0x006754b8 mono_jit_exec + 244
	29  Apollo                              0x00668820 main + 3928
	30  Apollo                              0x00002988 start + 40

=================================================================
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.
=================================================================


Any ideas?!

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