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 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4838c17750 (LWP 1736))]

Thread 2 (Thread 0x7f481446d910 (LWP 1737)):
#0  0x00007f48353cf5a9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f48386554fb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f4834a8c78c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f4838654445 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f48353caa04 in start_thread () from /lib/libpthread.so.0
#5  0x00007f4835faa80d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4838c17750 (LWP 1736)):
[KCrash Handler]
#5  0x00007f4836c6b484 in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#6  0x00007f4836c6db89 in QGraphicsItem::isWindow() const () from /usr/lib/libQtGui.so.4
#7  0x00007f4836ca1269 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#8  0x00007f48366eaefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x00007f48366f21ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00007f4837321ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0x00007f483873ac2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x00007f4836cb29f6 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f4838739f47 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#14 0x00007f48366eaecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x00007f48366f21ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x00007f4837321ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x00007f483873ac2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x00007f4836739b6b in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007f4836a952a6 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007f4836b24bc9 in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007f48366eaefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007f48366f21ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007f4837321ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#24 0x00007f483873ac2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#25 0x00007f48366f555b in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#26 0x00007f4836756b9e in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007f483677fd0c in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f483561bbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x00007f483561f598 in ?? () from /lib/libglib-2.0.so.0
#30 0x00007f483561f6c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x00007f48387631a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x00007f483677f4be in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007f4838739532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x00007f4838739904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0x00007f483873bab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#36 0x00007f482cabb4cf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#37 0x0000000000406da8 in _start ()

Reported using DrKonqi