This is a very random type of crashing but I can simulate the crash by cancelling the scandit overlay view controller and reopening repeatedly. There is no warning and no way to break on the error so it is happening pretty low level. I was able to capture this in the log...
Thread 0 Crashed:
0 UIKit 0x33988d74 -[UIView release] + 156
1 libobjc.A.dylib 0x3b56b462 objc_setProperty + 14
2 iECDDatasource 0x00195754 -[ScanditSDKOverlayController setKeyboardToolbar:] + 28
3 iECDDatasource 0x0019288e -[ScanditSDKOverlayController placeSearchBar] + 1338 4 iECDDatasource 0x00191c32 -[ScanditSDKOverlayController resetUI] + 58 5 iECDDatasource 0x00185c3a -[ScanditSDKBarcodePickerCore setSize:] + 1098 6 iECDDatasource 0x00182d46 -[ScanditSDKBarcodePickerCore viewWillLayoutSubviews] + 354 7 UIKit 0x3398c30c -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 276 8 QuartzCore 0x3361293e -[CALayer layoutSublayers] + 138 9 QuartzCore 0x3360e162 CA::Layer::layout_if_needed(CA::Transaction*) + 346 10 QuartzCore 0x3360dff4 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 12 11 QuartzCore 0x3360da08 CA::Context::commit_transaction(CA::Transaction*) + 224 12 QuartzCore 0x3360d81a CA::Transaction::commit() + 310 13 QuartzCore 0x33607548 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 52 14 CoreFoundation 0x311d2f66 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 18 15 CoreFoundation 0x311d08f2 __CFRunLoopDoObservers + 282 16 CoreFoundation 0x311d0c3e __CFRunLoopRun + 734 17 CoreFoundation 0x3113b46c CFRunLoopRunSpecific + 520 18 CoreFoundation 0x3113b24e CFRunLoopRunInMode + 102 19 GraphicsServices 0x35e752e6 GSEventRunModal + 134 20 UIKit 0x339f0840 UIApplicationMain + 1132 21 iECDDatasource 0x00786ddc wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr + 268 22 iECDDatasource 0x0074ac80 MonoTouch_UIKit_UIApplication_Main_string___string_string + 296 23 iECDDatasource 0x004a8888 iECDDatasource.Application:Main + 184 24 iECDDatasource 0x006f4d30 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 196 25 iECDDatasource 0x00bfb3f2 mono_jit_runtime_invoke (mini.c:6462) 26 iECDDatasource 0x00c42d02 mono_runtime_invoke (object.c:2827) 27 iECDDatasource 0x00c46a90 mono_runtime_exec_main (object.c:4054) 28 iECDDatasource 0x00c468d0 mono_runtime_run_main (object.c:3678) 29 iECDDatasource 0x00be588c mono_jit_exec (driver.g.c:962) 30 iECDDatasource 0x00c8beac main (main.m:485) 31 libdyld.dylib 0x3ba5dab4 start + 0