Version:            (using KDE 4.3.4)
Compiler:          gcc version 4.4.2 20091208 (prerelease) (GCC) Linux myhost 2.6.32-ARCH #1 SMP PREEMPT
OS:                Linux
Installed from:    Archlinux Packages

Plasma keep crashing every now and then for no reason. there is no trigger that I know, here is the debug log:

Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fcf1cea4760 (LWP 1721))]

Thread 2 (Thread 0x7fcef9fd5710 (LWP 1722)):
#0  0x00007fcf1c68707c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fcf1c8f2c6b in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007fcf18d6cc9c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fcf1c8f1ba5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fcf1c68281a in start_thread () from /lib/libpthread.so.0
#5  0x00007fcf1a04ac7d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcf1cea4760 (LWP 1721)):
[KCrash Handler]
#5  0x00007fcf141e8d60 in Plasma::ExtenderItem::config() const () from /usr/lib/libplasma.so.3
#6  0x00007fcf141eaa22 in Plasma::ExtenderItem::isGroup() const () from /usr/lib/libplasma.so.3
#7  0x00007fcf141e1215 in Plasma::Extender::isEmpty() const () from /usr/lib/libplasma.so.3
#8  0x00007fcf141e1279 in Plasma::ExtenderPrivate::updateEmptyExtenderLabel() () from /usr/lib/libplasma.so.3
#9  0x00007fcf141e1906 in Plasma::Extender::itemAddedEvent(Plasma::ExtenderItem*, QPointF const&) () from /usr/lib/libplasma.so.3
#10 0x00007fcf141e0a54 in Plasma::ExtenderPrivate::addExtenderItem(Plasma::ExtenderItem*, QPointF const&) () from /usr/lib/libplasma.so.3
#11 0x00007fcf141eb6d5 in Plasma::ExtenderItem::setExtender(Plasma::Extender*, QPointF const&) () from /usr/lib/libplasma.so.3
#12 0x00007fcf141ec4aa in Plasma::ExtenderItem::ExtenderItem(Plasma::Extender*, unsigned int) () from /usr/lib/libplasma.so.3
#13 0x00007fceff563730 in SystemTray::Applet::addNotification(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x00007fceff568bb4 in SystemTray::Applet::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#15 0x00007fcf1c9ebd3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x00007fceff5473f2 in SystemTray::Manager::notificationAdded(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#17 0x00007fceff5485c4 in SystemTray::Manager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#18 0x00007fcf1c9ebd3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#19 0x00007fceff548862 in SystemTray::Protocol::notificationCreated(SystemTray::Notification*) () from /usr/lib/kde4/plasma_applet_systemtray.so
#20 0x00007fceff55602c in SystemTray::DBusNotificationProtocol::dataUpdated(QString const&, QHash<QString, QVariant> const&) () from /usr/lib/kde4/plasma_applet_systemtray.so
#21 0x00007fceff556d68 in SystemTray::DBusNotificationProtocol::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#22 0x00007fcf1c9dedd7 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 0x00007fcf1c9df45e 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 0x00007fcf141d51b8 in Plasma::DataEnginePrivate::connectSource(Plasma::DataContainer*, QObject*, unsigned int, Plasma::IntervalAlignment, bool) () from /usr/lib/libplasma.so.3
#25 0x00007fcf141d5af9 in Plasma::DataEngine::connectSource(QString const&, QObject*, unsigned int, Plasma::IntervalAlignment) const () from /usr/lib/libplasma.so.3
#26 0x00007fceff556d7c in SystemTray::DBusNotificationProtocol::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_systemtray.so
#27 0x00007fcf1c9ebd3c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#28 0x00007fcf141d48d2 in Plasma::DataEngine::sourceAdded(QString const&) () from /usr/lib/libplasma.so.3
#29 0x00007fcf141d5d90 in Plasma::DataEngine::setData(QString const&, QHash<QString, QVariant> const&) () from /usr/lib/libplasma.so.3
#30 0x00007fcef91ace6c in NotificationsEngine::Notify(QString const&, unsigned int, QString const&, QString const&, QString const&, QString const&, QStringList const&, QMap<QString, QVariant> const&, int) () from /usr/lib/kde4/plasma_engine_notifications.so
#31 0x00007fcef91af07f in VisualNotificationsAdaptor::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_engine_notifications.so
#32 0x00007fcf18a9eee4 in ?? () from /usr/lib/libQtDBus.so.4
#33 0x00007fcf18aa00c3 in ?? () from /usr/lib/libQtDBus.so.4
#34 0x00007fcf18aa0947 in ?? () from /usr/lib/libQtDBus.so.4
#35 0x00007fcf18aa0bc8 in ?? () from /usr/lib/libQtDBus.so.4
#36 0x00007fcf1c9e6059 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#37 0x00007fcf1a77207c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x00007fcf1a77934e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#39 0x00007fcf1b3a58f6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#40 0x00007fcf1c9d6bfc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#41 0x00007fcf1c9d780a in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#42 0x00007fcf1c9ff583 in ?? () from /usr/lib/libQtCore.so.4
#43 0x00007fcf196d126e in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#44 0x00007fcf196d4c28 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#45 0x00007fcf196d4d50 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#46 0x00007fcf1c9ff123 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#47 0x00007fcf1a80514e in ?? () from /usr/lib/libQtGui.so.4
#48 0x00007fcf1c9d5532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#49 0x00007fcf1c9d5904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#50 0x00007fcf1c9d7ab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#51 0x00007fcf1072728f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#52 0x0000000000406eae in _start ()