Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.28.4 i686

What I was doing when the application crashed:
Random crashes occurs while starting Kontact.
Remarks:
- I do not use Akonadi (the Akonadi server is completely off and no Akonadi resources are added in systemconfig).
- I use Groupware addressbook though (hosted on localhost).
- I use Akregator inside Kontact and a couple of IMAP accounts inside KMail
- Crash don't occur every second execution as some others have reported.

As for now I haven't established a clear reproduction pattern, but this segfault happen quite often.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0xb7fdc20c in QString (this=0x853e930) at /usr/include/qt4/QtCore/qstring.h:711
#7  Kontact::Plugin::identifier (this=0x853e930) at ../../kontactinterfaces/plugin.cpp:97
#8  0xb7ff451e in Kontact::MainWindow::activatePluginModule (this=0x8383a18) at ../../../kontact/src/mainwindow.cpp:303
#9  0xb7ff45d4 in Kontact::MainWindow::setActivePluginModule (this=0x8383a18, module=...) at ../../../kontact/src/mainwindow.cpp:281
#10 0x0804bcef in KontactApp::newInstance (this=0xbff45eb4) at ../../../kontact/src/main.cpp:147
#11 0xb7d07926 in KUniqueApplicationAdaptor::newInstance (this=0x8386c78, asn_id=..., args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:459
#12 0xb7d079c2 in KUniqueApplicationAdaptor::qt_metacall (this=0x8386c78, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbff454c8) at ./kuniqueapplication_p.moc:75
#13 0xb6119be5 in QDBusConnectionPrivate::deliverCall (this=0x82edea8, object=0x8386c78, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:891
#14 0xb611ae31 in QDBusConnectionPrivate::activateCall (this=0x82edea8, object=0x8386c78, flags=337, msg=...) at qdbusintegrator.cpp:803
#15 0xb611b254 in QDBusConnectionPrivate::activateObject (this=0x82edea8, node=..., msg=..., pathStartPos=16) at qdbusintegrator.cpp:1370
#16 0xb611b73a in QDBusActivateObjectEvent::placeMetaCall (this=0x89a42e8) at qdbusintegrator.cpp:1464
#17 0xb78085e0 in QObject::event (this=0xbff45eb4, e=0x89a42e8) at kernel/qobject.cpp:1110
#18 0xb77f7b8b in QCoreApplication::event (this=0xbff45eb4, e=0x89a42e8) at kernel/qcoreapplication.cpp:1434
#19 0xb6e3d2c9 in QApplication::event (this=0xbff45eb4, e=0x89a42e8) at kernel/qapplication.cpp:2317
#20 0xb6e37a94 in QApplicationPrivate::notify_helper (this=0x82fd958, receiver=0xbff45eb4, e=0x89a42e8) at kernel/qapplication.cpp:4065
#21 0xb6e3fbee in QApplication::notify (this=0xbff45eb4, receiver=0xbff45eb4, e=0x89a42e8) at kernel/qapplication.cpp:3605
#22 0xb7d0062d in KApplication::notify (this=0xbff45eb4, receiver=0xbff45eb4, event=0x89a42e8) at ../../kdeui/kernel/kapplication.cpp:302
#23 0xb77f81eb in QCoreApplication::notifyInternal (this=0xbff45eb4, receiver=0xbff45eb4, event=0x89a42e8) at kernel/qcoreapplication.cpp:610
#24 0xb77f8e2e in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x82d6388) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x82d6388) at kernel/qcoreapplication.cpp:1247
#26 0xb77f900d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#27 0xb78234cf in QCoreApplication::sendPostedEvents (s=0x82f6ca0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=0x82f6ca0) at kernel/qeventdispatcher_glib.cpp:276
#29 0xb5257b38 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0xb525b3d0 in ?? () from /lib/libglib-2.0.so.0
#31 0xb525b503 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0xb7823041 in QEventDispatcherGlib::processEvents (this=0x82d60d8, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#33 0xb6ed7305 in QGuiEventDispatcherGlib::processEvents (this=0x82d60d8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#34 0xb77f683a in QEventLoop::processEvents (this=0xbff45e30, flags=...) at kernel/qeventloop.cpp:149
#35 0xb77f6c82 in QEventLoop::exec (this=0xbff45e30, flags=...) at kernel/qeventloop.cpp:201
#36 0xb77f90d9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0xb6e37917 in QApplication::exec () at kernel/qapplication.cpp:3525
#38 0x0804b4c6 in main (argc=1, argv=0xbff460b4) at ../../../kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 193514

Reported using DrKonqi