Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Unlocked screen saver after 18-hours dismissed event alarm tried to launch application

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  QBasicAtomicInt::deref (this=0x9c7dbb4, other=...) at ../../include/QtCore/../../src/corelib/arch/qatomic_i386.h:132
#7  QString::operator= (this=0x9c7dbb4, other=...) at tools/qstring.cpp:1132
#8  0x0047f5bc in Kontact::MainWindow::setActivePluginModule (this=0x9c7db50, module=...) at ../../../kontact/src/mainwindow.cpp:280
#9  0x0804bd0f in KontactApp::newInstance (this=0xbfe0f8a4) at ../../../kontact/src/main.cpp:147
#10 0x0079a380 in KUniqueApplicationAdaptor::newInstance (this=0x9debdc0, asn_id=..., args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:459
#11 0x0079aa92 in KUniqueApplicationAdaptor::qt_metacall (this=0x9debdc0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfe0eecc) at ./kuniqueapplication_p.moc:75
#12 0x00a8c7b4 in QDBusConnectionPrivate::deliverCall (this=0x9c6dc90, object=0x9debdc0, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:891
#13 0x00a8d9c5 in QDBusConnectionPrivate::activateCall (this=0x9c6dc90, object=0x9debdc0, flags=337, msg=...) at qdbusintegrator.cpp:803
#14 0x00a8e234 in QDBusConnectionPrivate::activateObject (this=0x9c6dc90, node=..., msg=..., pathStartPos=16) at qdbusintegrator.cpp:1347
#15 0x00a8e4da in QDBusActivateObjectEvent::placeMetaCall (this=0xa0e5448) at qdbusintegrator.cpp:1464
#16 0x023425fe in QObject::event (this=0xbfe0f8a4, e=0xa0e5448) at kernel/qobject.cpp:1111
#17 0x02331ffb in QCoreApplication::event (this=0xbfe0f8a4, e=0xa0e5448) at kernel/qcoreapplication.cpp:1434
#18 0x00ca79a6 in QApplication::event (this=0xbfe0f8a4, e=0xa0e5448) at kernel/qapplication.cpp:2317
#19 0x00ca1f54 in QApplicationPrivate::notify_helper (this=0x9c7ee00, receiver=0xbfe0f8a4, e=0xa0e5448) at kernel/qapplication.cpp:4056
#20 0x00ca967c in QApplication::notify (this=0xbfe0f8a4, receiver=0xbfe0f8a4, e=0xa0e5448) at kernel/qapplication.cpp:3603
#21 0x00792bfa in KApplication::notify (this=0xbfe0f8a4, receiver=0xbfe0f8a4, event=0xa0e5448) at ../../kdeui/kernel/kapplication.cpp:302
#22 0x023326cb in QCoreApplication::notifyInternal (this=0xbfe0f8a4, receiver=0xbfe0f8a4, event=0xa0e5448) at kernel/qcoreapplication.cpp:610
#23 0x023332b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x9c55820) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9c55820) at kernel/qcoreapplication.cpp:1247
#25 0x0233347d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#26 0x0235d3ff in QCoreApplication::sendPostedEvents (s=0x9c766c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#27 postEventSourceDispatch (s=0x9c766c0) at kernel/qeventdispatcher_glib.cpp:210
#28 0x0737ee78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x07382720 in ?? () from /lib/libglib-2.0.so.0
#30 0x07382853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x0235d02c in QEventDispatcherGlib::processEvents (this=0x9c559f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#32 0x00d42be5 in QGuiEventDispatcherGlib::processEvents (this=0x9c559f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x02330c79 in QEventLoop::processEvents (this=0xbfe0f804, flags=) at kernel/qeventloop.cpp:149
#34 0x023310ca in QEventLoop::exec (this=0xbfe0f804, flags=...) at kernel/qeventloop.cpp:201
#35 0x0233353f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#36 0x00ca1dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#37 0x0804b4e6 in main (argc=1, argv=0xbfe0fac4) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi