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 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
1. Muy setup was in Folder view setting in Desktop
2. I changed to Destop view 

The Plasma workspace crashed and a black screen came and it resumed working

No applicationj were affected

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78b4700 (LWP 1559))]

Thread 2 (Thread 0xac86bb70 (LWP 1562)):
#0  0x00b04422 in __kernel_vsyscall ()
#1  0x00e58e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x009fb87d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x004bae67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x0731a922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x004b9e32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x00e5480e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x009ee8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb78b4700 (LWP 1559)):
[KCrash Handler]
#6  0x0235f18a in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#7  0x02398527 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#8  0x01d5bf54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x01d6367c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x010f0bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0x005aa6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x023a95e7 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x02201a95 in ?? () from /usr/lib/libQtGui.so.4
#14 0x005a983a in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x01d5bf2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x01d635ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x010f0bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x005aa6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x01db0ad5 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x02160633 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x021fffaa in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x023a9406 in QGraphicsView::event(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x01d5bf54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x01d635ca in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x010f0bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#26 0x005aa6cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#27 0x01d66df6 in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#28 0x01dd021f in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#29 0x01dfd502 in ?? () from /usr/lib/libQtGui.so.4
#30 0x003cae88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x003ce730 in ?? () from /lib/libglib-2.0.so.0
#32 0x003ce863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x005d502c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x01dfcbe5 in ?? () from /usr/lib/libQtGui.so.4
#35 0x005a8c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x005a90ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x005ab53f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x01d5bdd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#39 0x06f2780d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#40 0x0804dde1 in _start ()

This bug may be a duplicate of or related to bug 224461

Reported using DrKonqi