Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.26.8.tex3 i686

What I was doing when the application crashed:
I was trying to switch between two Dolphin windows that were grouped on the taskbar, clicked on the grouping and that's when Plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#9  0xb5bcc026 in Plasma::PaintUtils::transition () from /usr/lib/libplasma.so.3
#10 0xa923ac49 in KPluginFactory::createInstance<Tasks, QObject> () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xa923696f in KPluginFactory::createInstance<Tasks, QObject> () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0xa923db5c in KPluginFactory::createInstance<Tasks, QObject> () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0xb6dd761d in QGraphicsScene::selectionArea () from /usr/lib/libQtGui.so.4
#14 0xb6de305e in QGraphicsScene::itemUpdated () from /usr/lib/libQtGui.so.4
#15 0xb6de551a in QGraphicsScene::drawItems () from /usr/lib/libQtGui.so.4
#16 0xb6df35e1 in QGraphicsView::drawItems () from /usr/lib/libQtGui.so.4
#17 0xb6e00dba in QGraphicsView::paintEvent () from /usr/lib/libQtGui.so.4
#18 0xb47f654e in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#19 0xb67dbe01 in QWidget::event () from /usr/lib/libQtGui.so.4
#20 0xb6ba5cc5 in QFrame::event () from /usr/lib/libQtGui.so.4
#21 0xb6c46404 in QAbstractScrollArea::viewportEvent () from /usr/lib/libQtGui.so.4
#22 0xb6dfe63c in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#23 0xb6c489a6 in QAbstractScrollArea::QAbstractScrollArea$base () from /usr/lib/libQtGui.so.4
#24 0xb7dff5f4 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#25 0xb67847c0 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#26 0xb678c254 in QApplication::notify () from /usr/lib/libQtGui.so.4
#27 0xb72bc201 in KApplication::notify () from /usr/lib/libkdeui.so.5
#28 0xb7e0041d in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#29 0xb67e41a1 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#30 0xb67e4a4c in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#31 0xb67e4937 in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#32 0xb67e3db0 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#33 0xb697f488 in QWidgetPrivate::repaint_sys () from /usr/lib/libQtGui.so.4
#34 0xb67d4b7e in QWidgetPrivate::syncBackingStore () from /usr/lib/libQtGui.so.4
#35 0xb67dbbfa in QWidget::event () from /usr/lib/libQtGui.so.4
#36 0xb6ba5cc5 in QFrame::event () from /usr/lib/libQtGui.so.4
#37 0xb6c46eba in QAbstractScrollArea::event () from /usr/lib/libQtGui.so.4
#38 0xb6dfe508 in QGraphicsView::event () from /usr/lib/libQtGui.so.4
#39 0xb47f8509 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#40 0xb67847ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#41 0xb678c254 in QApplication::notify () from /usr/lib/libQtGui.so.4
#42 0xb72bc201 in KApplication::notify () from /usr/lib/libkdeui.so.5
#43 0xb7e0041d in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#44 0xb7e010eb in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#45 0xb7e012bc in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#46 0xb7e2cb0b in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#47 0xb630c32c in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#48 0xb630fd68 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#49 0xb630fe8e in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#50 0xb7e2c708 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#51 0xb6827b1a in QX11Info::copyX11Data () from /usr/lib/libQtGui.so.4
#52 0xb7dfea5d in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#53 0xb7dfeeb1 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#54 0xb7e0138a in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#55 0xb6784664 in QApplication::exec () from /usr/lib/libQtGui.so.4
#56 0xb47ed148 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#57 0x0804dac5 in _start ()
#58 0x0804e75f in _start ()
#59 0x0804ebcc in _start ()
#60 0x0804f8ff in _start ()
#61 0xb63f0a36 in __libc_start_main () from /lib/i686/libc.so.6
#62 0x0804afc1 in _start ()

Reported using DrKonqi