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 2.6.30-2-amd64 x86_64
Distribution: Debian GNU/Linux 5.0.3 (lenny)

What I was doing when the application crashed:
I changed the configuration of the plasma desktop to type "folder". Crash and the changes disappear. 

 -- Backtrace:
Application: Plasma-Arbeitsfläche (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f4de3c43750 (LWP 4587))]

Thread 2 (Thread 0x7f4dc52bf910 (LWP 4601)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f4de368b499 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f4ddfa823b4 in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f4de368a4a5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f4de03be73a in start_thread (arg=<value optimized out>) at pthread_create.c:300
#5  0x00007f4de0f8769d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f4de3c43750 (LWP 4587)):
[KCrash Handler]
#5  0x00007f4de1c87d94 in QGraphicsItem::isWidget() const () from /usr/lib/libQtGui.so.4
#6  0x00007f4de1c8a4f9 in QGraphicsItem::isWindow() const () from /usr/lib/libQtGui.so.4
#7  0x00007f4de1cc0969 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#8  0x00007f4de16f801d in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#9  0x00007f4de170007a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00007f4de23510db in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#11 0x00007f4de376fc9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#12 0x00007f4de1cd0eb6 in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f4de376efb8 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#14 0x00007f4de16f7fec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x00007f4de170007a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x00007f4de23510db in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#17 0x00007f4de376fc9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#18 0x00007f4de17484ea in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007f4de1ab092b in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007f4de1b3fc09 in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007f4de16f801d in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007f4de170007a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007f4de23510db in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#24 0x00007f4de376fc9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#25 0x00007f4de16febf5 in QApplication::setActiveWindow(QWidget*) () from /usr/lib/libQtGui.so.4
#26 0x00007f4de1767721 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007f4de178f76c in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f4de060f13a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#29 0x00007f4de0612998 in ?? () from /lib/libglib-2.0.so.0
#30 0x00007f4de0612b4c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#31 0x00007f4de379839c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x00007f4de178ef1f in ?? () from /usr/lib/libQtGui.so.4
#33 0x00007f4de376e562 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x00007f4de376e934 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#35 0x00007f4de3770ba4 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#36 0x00007f4dd883b1fb in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#37 0x0000000000407264 in _start ()
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi