Why does MFMailComposeViewController crash?

I see a weird crash after calling "[MFMailComposeViewController canSendMail]".

I can’t play it, this is from iTunesConnect. This method (canSendMail) is called from the main thread, and at this moment I am not doing anything with the address book.

Any idea / suggestion would be VERY highly appreciated.

Thanks in advance!

Note. This happened in iOS 5.1.1.

Exception Type:  SIGABRT
Exception Codes: #0 at 0x3583232c
Crashed Thread:  0

Thread 0 Crashed:
0   libsystem_kernel.dylib              0x3583232c __pthread_kill + 8
1   libsystem_c.dylib                   0x347e729f abort + 95
2   AppSupport                          0x3133cc57 abortAfterFailingIntegrityCheck + 39
3   AppSupport                          0x3133ceef runIntegrityCheckAndAbort + 535
4   AppSupport                          0x3133d025 checkResultWithStatement + 113
5   AppSupport                          0x3133ea13 _connectAndCheckVersion + 1059
6   AppSupport                          0x3133eab7 CPSqliteDatabaseConnectionForWriting + 43
7   AppSupport                          0x3133eb8d CPSqliteDatabaseRegisterFunction + 21
8   AddressBook                         0x337873f7 ABCDBContextCreateWithPathAndAddressBook + 215
9   AddressBook                         0x3377b429 ABCCreateAddressBookWithDatabaseDirectoryAndForceInProcessMigrationInProcessLinkingAndResetSortKeys + 233
10  AddressBook                         0x33789cd7 ABAddressBookCreate + 15
11  Message                             0x31072453 MFThreadLocalAddressBook + 87
12  MessageUI                           0x313a5471 +[MFMailComposeController initialize] + 9
13  libobjc.A.dylib                     0x35edc973 _class_initialize + 239
14  libobjc.A.dylib                     0x35edc87b prepareForMethodLookup + 143
15  libobjc.A.dylib                     0x35edc747 lookUpMethod + 47
16  libobjc.A.dylib                     0x35edc713 _class_lookupMethodAndLoadCache3 + 19
17  libobjc.A.dylib                     0x35edbfcb objc_msgSend_uncached + 27
18  MessageUI                           0x313a5455 +[MFMailComposeViewController canSendMail] + 33

==============

UPDATE:

The following is a snippet of code that causes this failure:

-(IBAction)helpButtonPressed
{
    if([MFMailComposeViewController canSendMail])
    {   
        NSString* mail  = self.feedbackSettings[@"mail"];
        NSString* title = self.feedbackSettings[@"title"];

        MFMailComposeViewController* mailComposer = [[MFMailComposeViewController alloc] init];
        mailComposer.mailComposeDelegate = self;
        mailComposer.toRecipients = @[ mail ];
        mailComposer.subject = title;

        [self presentViewController:mailComposer animated:YES completion:nil];
        [mailComposer release], mailComposer = nil;
    }
    else
    {
        [UIAlertView showAlertViewWithTitle:nil message:NSLocalizedString(@"Please, setup a mail account in your phone first.", nil) buttonTitle:NSLocalizedString(@"OK", nil)];
    }
}