Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
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:
In system monitor applet (the all-in-one), 
view 1st item (cpu?)
view 2nd item (disk?)
view 3rd item (?)

Disabling 2nd item (because no use) ==> KDE crashes

((Will there be a more simple way to report bugs ?! and good year))

 -- Backtrace:
Application: Espace de travail Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb770b700 (LWP 1692))]

Thread 2 (Thread 0xab54eb70 (LWP 1695)):
#0  0x00866422 in __kernel_vsyscall ()
#1  0x00824e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0094087d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00dcce67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x00bd4922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x00dcbe32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x0082080e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x009338de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb770b700 (LWP 1692)):
[KCrash Handler]
#6  0x013e4527 in Plasma::Containment::containmentType() const () from /usr/lib/libplasma.so.3
#7  0x05b643c3 in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#8  0x05b64d6d in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#9  0x05b64ea8 in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#10 0x00ed2263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x00ed2ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x0147f6a9 in Plasma::PushButton::toggled(bool) () from /usr/lib/libplasma.so.3
#13 0x01480f20 in Plasma::PushButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#14 0x05b66d4a in MonitorButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#15 0x00ed2263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x00ed2ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x07c53be9 in QAbstractButton::toggled(bool) () from /usr/lib/libQtGui.so.4
#18 0x0797e4f4 in QAbstractButton::setChecked(bool) () from /usr/lib/libQtGui.so.4
#19 0x0797e680 in QAbstractButton::nextCheckState() () from /usr/lib/libQtGui.so.4
#20 0x0797e163 in ?? () from /usr/lib/libQtGui.so.4
#21 0x0797e431 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#22 0x0761c012 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x0797c3ee in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x07a2666d in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x075c6f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x075cf033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x01182bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x00ebc6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0x075cdf6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#30 0x07c341b5 in ?? () from /usr/lib/libQtGui.so.4
#31 0x07bd28bc in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#32 0x07c1f9ef in QGraphicsWidget::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x07bf4e14 in ?? () from /usr/lib/libQtGui.so.4
#34 0x07bf6443 in ?? () from /usr/lib/libQtGui.so.4
#35 0x07c01344 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#36 0x07c02f87 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x075c6f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x075ce67c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#39 0x01182bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#40 0x00ebc6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#41 0x07c14b1e in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#42 0x0761c012 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#43 0x079cb633 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#44 0x07a6a494 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x07c1451f in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#46 0x07a6ca95 in ?? () from /usr/lib/libQtGui.so.4
#47 0x00ebb83a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#48 0x075c6f2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#49 0x075cf033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#50 0x01182bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#51 0x00ebc6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#52 0x075cdf6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#53 0x0763c7c0 in ?? () from /usr/lib/libQtGui.so.4
#54 0x0763bc4b in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#55 0x07668502 in ?? () from /usr/lib/libQtGui.so.4
#56 0x00767e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#57 0x0076b730 in ?? () from /lib/libglib-2.0.so.0
#58 0x0076b863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#59 0x00ee702c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#60 0x07667be5 in ?? () from /usr/lib/libQtGui.so.4
#61 0x00ebac79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#62 0x00ebb0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#63 0x00ebd53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#64 0x075c6dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#65 0x05a5780d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#66 0x0804dde1 in _start ()

Reported using DrKonqi