Crash in MobileCoreServices -[LSOpenOperation completeOperation]
===

I've received a crash report (iPod4,1, iOS 5.1.1) with this in a thread:

    Thread 11 Crashed:
    0   libobjc.A.dylib                   0x346e5f78 objc_msgSend + 16
    1   Foundation                        0x37f8a74c NSKVOPendingNotificationCreate + 216
    2   Foundation                        0x37f8a652 NSKeyValuePushPendingNotificationPerThread + 62
    3   Foundation                        0x37f7c744 NSKeyValueWillChange + 408
    4   Foundation                        0x37f53848 -[NSObject(NSKeyValueObserverNotification) willChangeValueForKey:] + 176
    5   MobileCoreServices                0x33ffa00c -[LSOpenOperation completeOperation] + 32
    6   MobileCoreServices                0x33ffa48a -[LSOpenOperation main] + 1050
    7   Foundation                        0x37f61a7a -[NSThread main] + 66
    8   Foundation                        0x37ff558a __NSThread__main__ + 1042
    9   libsystem_c.dylib                 0x30f3172e _pthread_start + 314
    10  libsystem_c.dylib                 0x30f315e8 thread_start + 0

Do you know what can be the reason of this crash?

Thanks for any help in advance!