Gpgtools Libmacgpg

This seems to happen if the number of expected strings
characters is not met.

The user in the following discussion is experiencing this issue:
http://support.gpgtools.org/discussions/everything/9676-only-works-...

7/15/13 4:23:00.484 PM  Mail[799]   (
    0   CoreFoundation                      0x00007fff8de38b06 __exceptionPreprocess + 198
    1   libobjc.A.dylib                     0x00007fff8bb2d3f0 objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff8de388dc +[NSException raise:format:] + 204
    3   CoreFoundation                      0x00007fff8ddfd34e -[__NSCFString characterAtIndex:] + 94
    4   Libmacgpg                           0x000000010a3f24c2 +[NSDate(GPGExtension) dateWithGPGString:] + 65
    5   Libmacgpg                           0x000000010a3fb8e1 -[GPGSuper_Template updateWithLine:] + 313
    6   Libmacgpg                           0x000000010a3fb200 -[GPGKey_Template updateWithLine:] + 72
    7   Libmacgpg                           0x000000010a3f2f04 -[GPGKey updateWithListing:isSecret:withSigs:] + 177
    8   Libmacgpg                           0x000000010a3f2e25 -[GPGKey initWithListing:fingerprint:isSecret:withSigs:] + 235
    9   Libmacgpg                           0x000000010a3f2d1f +[GPGKey keyWithListing:fingerprint:isSecret:withSigs:] + 80
    10  Libmacgpg                           0x000000010a3f14dc -[GPGController updateKeysWithDict:] + 480
    11  Foundation                          0x00007fff8bda25ca __NSThreadPerformPerform + 225
    12  CoreFoundation                      0x00007fff8ddb7b31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    13  CoreFoundation                      0x00007fff8ddb7455 __CFRunLoopDoSources0 + 245
    14  CoreFoundation                      0x00007fff8ddda7f5 __CFRunLoopRun + 789
    15  CoreFoundation                      0x00007fff8ddda0e2 CFRunLoopRunSpecific + 290
    16  HIToolbox                           0x00007fff8f66eeb4 RunCurrentEventLoopInMode + 209
    17  HIToolbox                           0x00007fff8f66ec52 ReceiveNextEventCommon + 356
    18  HIToolbox                           0x00007fff8f66eae3 BlockUntilNextEventMatchingListInMode + 62
    19  AppKit                              0x00007fff93e85533 _DPSNextEvent + 685
    20  AppKit                              0x00007fff93e84df2 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 128
    21  AppKit                              0x00007fff93e7c1a3 -[NSApplication run] + 517
    22  AppKit                              0x00007fff93e20bd6 NSApplicationMain + 869
    23  libdyld.dylib                       0x00007fff8d3a77e1 start + 0
)