Application that crashed: kde4-window-decorator
Version of the application: 0.0.1
KDE Version: 4.3.4 (KDE 4.3.4) "release 2"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.5-0.1-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
just broken window manager (no border). I think because compiz manager usage while using compositing

 -- Backtrace:
Application: KDE Window Decorator (kde4-window-decorator), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f3d1a0d28de in KDecorationUnstable::compositingActive() const () from /usr/lib64/libkdecorations.so.4
#6  0x00007f3d04c795c8 in KColorUtils::darken(QColor const&, double, double) () from /usr/lib64/kde4/kwin3_oxygen.so
#7  0x00007f3d1a0d75df in KCommonDecoration::eventFilter(QObject*, QEvent*) () from /usr/lib64/libkdecorations.so.4
#8  0x00007f3d1b5b0458 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#9  0x00007f3d1e3f2a7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#10 0x00007f3d1e3fad3a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#11 0x00007f3d18dbb12b in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#12 0x00007f3d1b5b115c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#13 0x00007f3d1e442303 in QWidgetPrivate::sendPendingMoveAndResizeEvents(bool, bool) () from /usr/lib64/libQtGui.so.4
#14 0x00007f3d1e448773 in QWidgetPrivate::show_helper() () from /usr/lib64/libQtGui.so.4
#15 0x00007f3d1e448e3a in QWidget::setVisible(bool) () from /usr/lib64/libQtGui.so.4
#16 0x00007f3d1e448c0e in QWidgetPrivate::showChildren(bool) () from /usr/lib64/libQtGui.so.4
#17 0x00007f3d1e44878f in QWidgetPrivate::show_helper() () from /usr/lib64/libQtGui.so.4
#18 0x00007f3d1e448e3a in QWidget::setVisible(bool) () from /usr/lib64/libQtGui.so.4
#19 0x0000000000417538 in ?? ()
#20 0x000000000041c9e0 in ?? ()
#21 0x00000000004143d8 in ?? ()
#22 0x000000000040c90a in Plasma::Theme::font(Plasma::Theme::FontRole) const ()
#23 0x00007f3d191d1a7d in __libc_start_main () from /lib64/libc.so.6
#24 0x000000000040b779 in Plasma::Theme::font(Plasma::Theme::FontRole) const ()
#25 0x00007fff4e22cf78 in ?? ()
#26 0x000000000000001c in ?? ()
#27 0x0000000000000002 in ?? ()
#28 0x00007fff4e22d40b in ?? ()
#29 0x00007fff4e22d422 in ?? ()
#30 0x0000000000000000 in ?? ()

Reported using DrKonqi