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 2.6.31-22-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I opened different parts (CPU load, RAM, disk usage etc. ) of the Plasma programm System-Monitor (don't know the english name). It finally crashed when the top of the screen had been reached by the systemmonitor. 
Plasam crashed again when I was reopening the systemmonitor and clicking around on the Monitor branches.

 -- Backtrace:
Application: Plasma-Arbeitsfläche (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb784d700 (LWP 1954))]

Thread 2 (Thread 0xabe3ab70 (LWP 1957)):
#0  0x006f4422 in __kernel_vsyscall ()
#1  0x0059ee15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x007ce9ad in __pthread_cond_wait (cond=0xa2505d8, mutex=0xa2505c0) at forward.c:139
#3  0x0015fe67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x008d2922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x0015ee32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x0059a80e in start_thread (arg=0xabe3ab70) at pthread_create.c:300
#7  0x007c1a0e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130

Thread 1 (Thread 0xb784d700 (LWP 1954)):
[KCrash Handler]
#6  0x01375527 in Plasma::Containment::containmentType() const () from /usr/lib/libplasma.so.3
#7  0x0758e3c3 in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#8  0x0758ed6d in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#9  0x0758eea8 in ?? () from /usr/lib/kde4/plasma_applet_system-monitor.so
#10 0x00265263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x00265ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x014106a9 in Plasma::PushButton::toggled(bool) () from /usr/lib/libplasma.so.3
#13 0x01411f20 in Plasma::PushButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#14 0x07590d4a in MonitorButton::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_system-monitor.so
#15 0x00265263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0x00265ec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#17 0x09159be9 in QAbstractButton::toggled(bool) () from /usr/lib/libQtGui.so.4
#18 0x08e844f4 in QAbstractButton::setChecked(bool) () from /usr/lib/libQtGui.so.4
#19 0x08e84680 in QAbstractButton::nextCheckState() () from /usr/lib/libQtGui.so.4
#20 0x08e84163 in ?? () from /usr/lib/libQtGui.so.4
#21 0x08e84431 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#22 0x08b22012 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x08e823ee in QAbstractButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x08f2c66d in QPushButton::event(QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x08accf54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x08ad5033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x01064bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#29 0x08ad3f6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#30 0x0913a1b5 in ?? () from /usr/lib/libQtGui.so.4
#31 0x090d88bc in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#32 0x091259ef in QGraphicsWidget::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x090fae14 in ?? () from /usr/lib/libQtGui.so.4
#34 0x090fc443 in ?? () from /usr/lib/libQtGui.so.4
#35 0x09107344 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#36 0x09108f87 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x08accf54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#38 0x08ad467c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#39 0x01064bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#40 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#41 0x0911ab1e in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#42 0x08b22012 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#43 0x08ed1633 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#44 0x08f70494 in QAbstractScrollArea::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x0911a51f in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#46 0x08f72a95 in ?? () from /usr/lib/libQtGui.so.4
#47 0x0024e83a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#48 0x08accf2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#49 0x08ad5033 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#50 0x01064bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#51 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#52 0x08ad3f6e in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#53 0x08b427c0 in ?? () from /usr/lib/libQtGui.so.4
#54 0x08b41c4b in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#55 0x08b6e502 in ?? () from /usr/lib/libQtGui.so.4
#56 0x003dce88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#57 0x003e0730 in ?? () from /lib/libglib-2.0.so.0
#58 0x003e0863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#59 0x0027a02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#60 0x08b6dbe5 in ?? () from /usr/lib/libQtGui.so.4
#61 0x0024dc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#62 0x0024e0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#63 0x0025053f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#64 0x08accdd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#65 0x04cb980d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#66 0x0804dde1 in _start ()

Reported using DrKonqi