Crash on exit on OS X

[Big O]

Thread 0 Crashed:
0   ...collection-sqlcollection.so	0x1a67eddb my_thread_end + 43
1   ...collection-sqlcollection.so	0x1a65fd7a
ThreadInitializer::~ThreadInitializer() + 26
2   ...collection-sqlcollection.so	0x1a65fe26
QThreadStorage<ThreadInitializer*>::deleteData(void*) + 22
(qthreadstorage.h:129)
3   QtCore                        	0x002c280d
QThreadStorageData::finish(void**) + 269
4   QtCore                        	0x003aa841
QCoreApplicationPrivate::~QCoreApplicationPrivate() + 49
5   QtGui                         	0x03b641ca
QApplicationPrivate::~QApplicationPrivate() + 202
6   QtCore                        	0x003be247 QObject::~QObject() + 1191
7   QtGui                         	0x03b5f621
QApplication::~QApplication() + 1409
8   libamaroklib.1.dylib          	0x00b6f008 App::~App() + 616
9                                 	0x00014a2d main + 12637 (main.cpp:129)
10                                	0x000113d2 _start + 216
11                                	0x000112f9 start + 41

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