Application: kde4-window-decorator (0.0.1)
KDE Platform Version: 4.4.2 (KDE 4.4.2) "release 231"
Qt Version: 4.6.2
Operating System: Linux 2.6.31.12-0.2-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

-- Information about the crash:
Window Manager crashes after login. Happened after upgrade to KDE 4.4 from 4.3

The crash can be reproduced every time.

 -- Backtrace:
Application: KDE Window Decorator (kde4-window-decorator), signal: Segmentation fault
[KCrash Handler]
#5  0x0000000000000000 in ?? ()
#6  0x00007f8b7438d471 in KDecorationUnstable::clientGroupItems() const () from /usr/lib64/libkdecorations.so.4
#7  0x00007f8b7438ea17 in KCommonDecorationUnstable::clientGroupItems() const () from /usr/lib64/libkdecorations.so.4
#8  0x00007f8b5a35e5c2 in KCommonDecorationUnstable::closeClientGroupItem(int) () from /usr/lib64/kde4/kwin3_oxygen.so
#9  0x00007f8b5a35f982 in KCommonDecorationUnstable::closeClientGroupItem(int) () from /usr/lib64/kde4/kwin3_oxygen.so
#10 0x00007f8b7438e0ef in KCommonDecoration::eventFilter(QObject*, QEvent*) () from /usr/lib64/libkdecorations.so.4
#11 0x00007f8b5a3411b0 in KCommonDecorationUnstable::closeClientGroupItem(int) () from /usr/lib64/kde4/kwin3_oxygen.so
#12 0x00007f8b74b8fd97 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#13 0x00007f8b75829dec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#14 0x00007f8b758303fb in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#15 0x00007f8b731ca506 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#16 0x00007f8b74b9098c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#17 0x00007f8b758883bd in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f8b758892dc in QWidget::render(QPaintDevice*, QPoint const&, QRegion const&, QFlags<QWidget::RenderFlag>) () from /usr/lib64/libQtGui.so.4
#19 0x000000000041f4ba in KWin::PaintRedirector::performPendingPaint() ()
#20 0x0000000000418d9b in KWD::Window::decorRepaintPending() ()
#21 0x000000000041ff7c in KWD::Window::qt_metacall(QMetaObject::Call, int, void**) ()
#22 0x00007f8b74ba378f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#23 0x00000000004200d0 in KWin::PaintRedirector::qt_metacall(QMetaObject::Call, int, void**) ()
#24 0x00007f8b74ba378f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#25 0x00007f8b74ba03e3 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#26 0x00007f8b75829e1c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#27 0x00007f8b758303fb in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#28 0x00007f8b731ca506 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#29 0x00007f8b74b9098c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#30 0x00007f8b74bbd655 in ?? () from /usr/lib64/libQtCore.so.4
#31 0x00007f8b74bba1c4 in ?? () from /usr/lib64/libQtCore.so.4
#32 0x00007f8b72706dee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#33 0x00007f8b7270a7b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#34 0x00007f8b7270a8e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#35 0x00007f8b74bb9eb3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#36 0x00007f8b758d851e in ?? () from /usr/lib64/libQtGui.so.4
#37 0x00007f8b74b8f2a2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#38 0x00007f8b74b8f67c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#39 0x00007f8b74b933cb in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#40 0x000000000040a905 in main ()

Reported using DrKonqi