Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-ARCH x86_64

What I was doing when the application crashed:
I clicked the shaman automatic updates icon from system tray. From the menu I chose "update the system" and after that KDE crashed.

 -- Backtrace:
Application: Plasma-työtila (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f90835c6fe8 in Plasma::ExtenderItem::config() const () from /usr/lib/libplasma.so.3
#6  0x00007f90835c8ca2 in Plasma::ExtenderItem::isGroup() const () from /usr/lib/libplasma.so.3
#7  0x00007f90835bf495 in Plasma::Extender::isEmpty() const () from /usr/lib/libplasma.so.3
#8  0x00007f90835bf4f9 in Plasma::ExtenderPrivate::updateEmptyExtenderLabel() () from /usr/lib/libplasma.so.3
#9  0x00007f90835bfb86 in Plasma::Extender::itemAddedEvent(Plasma::ExtenderItem*, QPointF const&) () from /usr/lib/libplasma.so.3
#10 0x00007f90835becd4 in Plasma::ExtenderPrivate::addExtenderItem(Plasma::ExtenderItem*, QPointF const&) () from /usr/lib/libplasma.so.3
#11 0x00007f90835c9955 in Plasma::ExtenderItem::setExtender(Plasma::Extender*, QPointF const&) () from /usr/lib/libplasma.so.3
#12 0x00007f90835ca72a in Plasma::ExtenderItem::ExtenderItem(Plasma::Extender*, unsigned int) () from /usr/lib/libplasma.so.3
#13 0x00007f906ebea5a0 in SystemTray::Applet::addNotification(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x00007f906ebefa24 in SystemTray::Applet::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#15 0x00007f908c0fc47c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x00007f906ebce3f2 in SystemTray::Manager::notificationAdded(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#17 0x00007f906ebcf5c4 in SystemTray::Manager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#18 0x00007f908c0fc47c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#19 0x00007f906ebcf862 in SystemTray::Protocol::notificationCreated(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#20 0x00007f906ebdced2 in SystemTray::DBusNotificationProtocol::dataUpdated(QString const&, QHash<QString, QVariant> const&) () from /usr/lib/kde4/plasma_applet_systemtray.so
#21 0x00007f906ebddbd8 in SystemTray::DBusNotificationProtocol::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#22 0x00007f908c0ef517 in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const () from /usr/lib/libQtCore.so.4
#23 0x00007f908c0efb9e in QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) () from /usr/lib/libQtCore.so.4
#24 0x00007f90835b3488 in Plasma::DataEnginePrivate::connectSource(Plasma::DataContainer*, QObject*, unsigned int, Plasma::IntervalAlignment, bool) () from /usr/lib/libplasma.so.3
#25 0x00007f90835b3dc9 in Plasma::DataEngine::connectSource(QString const&, QObject*, unsigned int, Plasma::IntervalAlignment) const () from /usr/lib/libplasma.so.3
#26 0x00007f906ebddbec in SystemTray::DBusNotificationProtocol::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#27 0x00007f908c0fc47c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#28 0x00007f90835b2ba2 in Plasma::DataEngine::sourceAdded(QString const&) () from /usr/lib/libplasma.so.3
#29 0x00007f90835b4060 in Plasma::DataEngine::setData(QString const&, QHash<QString, QVariant> const&) () from /usr/lib/libplasma.so.3
#30 0x00007f906d7129e0 in NotificationsEngine::Notify(QString const&, unsigned int, QString const&, QString const&, QString const&, QStringList const&, QMap<QString, QVariant> const&, int) ()
   from /usr/lib/kde4/plasma_engine_notifications.so
#31 0x00007f906d71585e in NotificationsAdaptor::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_engine_notifications.so
#32 0x00007f9088192934 in ?? () from /usr/lib/libQtDBus.so.4
#33 0x00007f9088193b13 in ?? () from /usr/lib/libQtDBus.so.4
#34 0x00007f9088194397 in ?? () from /usr/lib/libQtDBus.so.4
#35 0x00007f9088194618 in ?? () from /usr/lib/libQtDBus.so.4
#36 0x00007f908c0f6799 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#37 0x00007f9089e7a60c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x00007f9089e818de in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#39 0x00007f908aaae926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#40 0x00007f908c0e733c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#41 0x00007f908c0e7f4a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#42 0x00007f908c10fcc3 in ?? () from /usr/lib/libQtCore.so.4
#43 0x00007f9088dc826e in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#44 0x00007f9088dcbc28 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#45 0x00007f9088dcbd50 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#46 0x00007f908c10f863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#47 0x00007f9089f0d6de in ?? () from /usr/lib/libQtGui.so.4
#48 0x00007f908c0e5c72 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#49 0x00007f908c0e6044 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#50 0x00007f908c0e81f9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#51 0x00007f907fd1d84f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#52 0x0000000000406eae in _start ()

Reported using DrKonqi