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 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I moved a panel from the bottom screen edge to the top.  It crashed, then restarted on its own.  Not a terrible experience for me.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0x0471318a in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#7  0x0474c527 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#8  0x0410ff54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x0411767c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x01192bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x0475d5e7 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x045b5a95 in ?? () from /usr/lib/libQtGui.so.4
#14 0x0024e83a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x0410ff2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x041175ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x01192bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x04164ad5 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x04514633 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x045b3faa in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x0475d406 in QGraphicsView::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x0410ff54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x041175ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x01192bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x0024f6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x0411adf6 in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#28 0x0418421f in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#29 0x041b1502 in ?? () from /usr/lib/libQtGui.so.4
#30 0x00cdce78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x00ce0720 in ?? () from /lib/libglib-2.0.so.0
#32 0x00ce0853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x0027a02c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x041b0be5 in ?? () from /usr/lib/libQtGui.so.4
#35 0x0024dc79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x0024e0ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x0025053f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x0410fdd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x014b080d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#40 0x0804dde1 in _start ()

Reported using DrKonqi