Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1) "release 6"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.5-0.1-desktop i686
Distribution: "openSUSE 11.2 (i586)"

What I was doing when the application crashed:
I set the plasma option to use different activity for each desktop. When changing the desktop plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5623700 (LWP 3355))]

Thread 2 (Thread 0xa7870b70 (LWP 3356)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb74c2d95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7522750 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#3  0xb5c71a04 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7521623 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb74be6e5 in start_thread () from /lib/libpthread.so.0
#6  0xb74be600 in ?? () from /lib/libpthread.so.0

Thread 1 (Thread 0xb5623700 (LWP 3355)):
[KCrash Handler]
#6  0xb67baa67 in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#7  0xb67bd962 in QGraphicsItem::isWindow() const () from /usr/lib/libQtGui.so.4
#8  0xb67f52af in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#9  0xb61bc8fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0xb61c434e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#11 0xb6bface1 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#12 0xb761832e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#13 0xb6806e68 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#14 0xb6653786 in ?? () from /usr/lib/libQtGui.so.4
#15 0xb761750e in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#16 0xb61bc8d0 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb61c429e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#18 0xb6bface1 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#19 0xb761832e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#20 0xb6213d5f in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0xb65b0bb5 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0xb6651bfa in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0xb6806c58 in QGraphicsView::event(QEvent*) () from /usr/lib/libQtGui.so.4
#24 0xb61bc8fc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0xb61c429e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0xb6bface1 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#27 0xb761832e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#28 0xb61c7a64 in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#29 0xb62336cb in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#30 0xb625eb68 in ?? () from /usr/lib/libQtGui.so.4
#31 0xb5d974c2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#32 0xb5d9ad98 in ?? () from /usr/lib/libglib-2.0.so.0
#33 0xb5d9aebe in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#34 0xb7644011 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0xb625e29a in ?? () from /usr/lib/libQtGui.so.4
#36 0xb761698d in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0xb7616dd9 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0xb7619270 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#39 0xb61bc774 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#40 0xb306bb49 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#41 0x0804e147 in _start ()

Reported using DrKonqi