Application that crashed: kontact
Version of the application: 4.3.4
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Kontact crashes, when i close it, and start it again in the same session

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  0x007a01fc in QString (this=0x9271dd0) at /usr/include/qt4/QtCore/qstring.h:711
#7  Kontact::Plugin::identifier (this=0x9271dd0) at ../../kontactinterfaces/plugin.cpp:97
#8  0x0063650e in Kontact::MainWindow::activatePluginModule (this=0x9061878) at ../../../kontact/src/mainwindow.cpp:303
#9  0x006365c4 in Kontact::MainWindow::setActivePluginModule (this=0x9061878, module=...) at ../../../kontact/src/mainwindow.cpp:281
#10 0x0804bd0f in KontactApp::newInstance (this=0xbff04c84) at ../../../kontact/src/main.cpp:147
#11 0x00982930 in KUniqueApplicationAdaptor::newInstance (this=0x9122290, asn_id=..., args=...) at ../../kdeui/kernel/kuniqueapplication.cpp:459
#12 0x00983042 in KUniqueApplicationAdaptor::qt_metacall (this=0x9122290, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbff042ac) at ./kuniqueapplication_p.moc:75
#13 0x00df77b4 in QDBusConnectionPrivate::deliverCall (this=0x9047c90, object=0x9122290, msg=..., metaTypes=..., slotIdx=4) at qdbusintegrator.cpp:891
#14 0x00df89c5 in QDBusConnectionPrivate::activateCall (this=0x9047c90, object=0x9122290, flags=337, msg=...) at qdbusintegrator.cpp:803
#15 0x00df9234 in QDBusConnectionPrivate::activateObject (this=0x9047c90, node=..., msg=..., pathStartPos=16) at qdbusintegrator.cpp:1347
#16 0x00df94da in QDBusActivateObjectEvent::placeMetaCall (this=0xa8e2d40) at qdbusintegrator.cpp:1464
#17 0x00ca85fe in QObject::event (this=0xbff04c84, e=0xa8e2d40) at kernel/qobject.cpp:1111
#18 0x00c97ffb in QCoreApplication::event (this=0xbff04c84, e=0xa8e2d40) at kernel/qcoreapplication.cpp:1434
#19 0x010139a6 in QApplication::event (this=0xbff04c84, e=0xa8e2d40) at kernel/qapplication.cpp:2317
#20 0x0100df54 in QApplicationPrivate::notify_helper (this=0x904f2e0, receiver=0xbff04c84, e=0xa8e2d40) at kernel/qapplication.cpp:4056
#21 0x0101567c in QApplication::notify (this=0xbff04c84, receiver=0xbff04c84, e=0xa8e2d40) at kernel/qapplication.cpp:3603
#22 0x0097b1aa in KApplication::notify (this=0xbff04c84, receiver=0xbff04c84, event=0xa8e2d40) at ../../kdeui/kernel/kapplication.cpp:302
#23 0x00c986cb in QCoreApplication::notifyInternal (this=0xbff04c84, receiver=0xbff04c84, event=0xa8e2d40) at kernel/qcoreapplication.cpp:610
#24 0x00c992b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x902f820) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#25 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x902f820) at kernel/qcoreapplication.cpp:1247
#26 0x00c9947d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#27 0x00cc33ff in QCoreApplication::sendPostedEvents (s=0x9051b18) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#28 postEventSourceDispatch (s=0x9051b18) at kernel/qeventdispatcher_glib.cpp:210
#29 0x035e3e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x035e7730 in ?? () from /lib/libglib-2.0.so.0
#31 0x035e7863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x00cc302c in QEventDispatcherGlib::processEvents (this=0x902f9f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#33 0x010aebe5 in QGuiEventDispatcherGlib::processEvents (this=0x902f9f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00c96c79 in QEventLoop::processEvents (this=0xbff04be4, flags=) at kernel/qeventloop.cpp:149
#35 0x00c970ca in QEventLoop::exec (this=0xbff04be4, flags=...) at kernel/qeventloop.cpp:201
#36 0x00c9953f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x0100ddd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#38 0x0804b4e6 in main (argc=1, argv=0xbff04ea4) at ../../../kontact/src/main.cpp:218

This bug may be a duplicate of or related to bug 213323

Reported using DrKonqi