Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Ubuntu Packages

I was watching what was disponible in the screensaver list. I change it for random, and after I quit without saving.

I cannot reproduce the bug, but I've the backtrace:

Application : Configuration du système (systemsettings), signal SIGSEGV

Thread 1 (Thread 0xb60516c0 (LWP 27561)):
[KCrash Handler]
#6  0xb6b261d0 in QWidgetPrivate::reparentFocusWidgets () from /usr/lib/libQtGui.so.4
#7  0xb6b37177 in QWidget::setParent () from /usr/lib/libQtGui.so.4
#8  0xb6b37a31 in QWidgetPrivate::init () from /usr/lib/libQtGui.so.4
#9  0xb6b3827e in QWidget::QWidget () from /usr/lib/libQtGui.so.4
#10 0xb2f1d628 in ?? () from /usr/lib/kde4/kcm_screensaver.so
#11 0xb2f0de24 in ?? () from /usr/lib/kde4/kcm_screensaver.so
#12 0xb2f107a4 in ?? () from /usr/lib/kde4/kcm_screensaver.so
#13 0xb744fa60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb74507e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb46e5723 in K3Process::processExited () from /usr/lib/libkde3support.so.4
#16 0xb46e576f in K3Process::processHasExited () from /usr/lib/libkde3support.so.4
#17 0xb46e6514 in K3Process::wait () from /usr/lib/libkde3support.so.4
#18 0xb2f0d70c in ?? () from /usr/lib/kde4/kcm_screensaver.so
#19 0xb7f2cafc in KCModuleProxy::deleteClient () from /usr/lib/libkutils.so.4
#20 0xb7f2cee5 in KCModuleProxy::~KCModuleProxy () from /usr/lib/libkutils.so.4
#21 0xb74490ff in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#22 0xb6b35fb8 in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#23 0xb74490ff in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#24 0xb6b36928 in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#25 0xb6e6d2e1 in QFrame::~QFrame () from /usr/lib/libQtGui.so.4
#26 0xb6f0394d in QAbstractScrollArea::~QAbstractScrollArea () from /usr/lib/libQtGui.so.4
#27 0xb6f095a5 in QScrollArea::~QScrollArea () from /usr/lib/libQtGui.so.4
#28 0xb74490ff in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#29 0xb6b36928 in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#30 0xb6e6d2e1 in QFrame::~QFrame () from /usr/lib/libQtGui.so.4
#31 0xb6eda6d1 in QStackedWidget::~QStackedWidget () from /usr/lib/libQtGui.so.4
#32 0xb79c3942 in ?? () from /usr/lib/libkdeui.so.5
#33 0xb74490ff in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#34 0xb6b36928 in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#35 0xb79c2630 in KPageView::~KPageView () from /usr/lib/libkdeui.so.5
#36 0xb79c7915 in KPageWidget::~KPageWidget () from /usr/lib/libkdeui.so.5
#37 0xb74490ff in QObjectPrivate::deleteChildren () from /usr/lib/libQtCore.so.4
#38 0xb6b36928 in QWidget::~QWidget () from /usr/lib/libQtGui.so.4
#39 0xb6f49fa6 in QDialog::~QDialog () from /usr/lib/libQtGui.so.4
#40 0xb78f2754 in KDialog::~KDialog () from /usr/lib/libkdeui.so.5
#41 0xb79c0de1 in KPageDialog::~KPageDialog () from /usr/lib/libkdeui.so.5
#42 0x080546dd in _start ()