Version:           unspecified (using KDE 4.6.0) 
OS:                Linux

switching from classic menu to launcher does not work, crashes plasma desktop

Reproducible: Always

Steps to Reproduce:
try switch from classic to launcher

Actual Results:  
desktop crashes and restarts, offers bug report, does not work either, cannot find debug rpms, although opensuse-debug repo is enabled in repositories.

Expected Results:  
should have been in launcher mode.
this bug is very old. but now, I cant reset it manually in config applet, because it is unfindable in the enormous pile of subpanels you guys made since kde4


Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.00 (4.6.0) "release 6"
Qt Version: 4.7.1
Operating System: Linux 2.6.37.6-0.5-desktop x86_64
Distribution: "openSUSE 11.4 (x86_64)"

-- Information about the crash:
<In detail, tell us what you were doing  when the application crashed.>

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe4f3ac7760 (LWP 7368))]

Thread 2 (Thread 0x7fe4d1c97700 (LWP 7370)):
#0  0x00007fe4f11cc503 in poll () from /lib64/libc.so.6
#1  0x00007fe4ee03e114 in ?? () from /lib64/libglib-2.0.so.0
#2  0x00007fe4ee03e650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007fe4f27bd976 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#4  0x00007fe4f2792052 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#5  0x00007fe4f2792265 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#6  0x00007fe4f26a71e4 in QThread::exec() () from /usr/lib64/libQtCore.so.4
#7  0x00007fe4f2773968 in ?? () from /usr/lib64/libQtCore.so.4
#8  0x00007fe4f26a9a5e in ?? () from /usr/lib64/libQtCore.so.4
#9  0x00007fe4f241aa3f in start_thread () from /lib64/libpthread.so.0
#10 0x00007fe4f11d567d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe4f3ac7760 (LWP 7368)):
[KCrash Handler]
#6  0x00007fe4d91b88a5 in ?? () from /usr/lib64/kde4/plasma_applet_simplelauncher.so
#7  0x00007fe4d91b93f4 in ?? () from /usr/lib64/kde4/plasma_applet_simplelauncher.so
#8  0x00007fe4f27a7def in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#9  0x00007fe4f27ef2a4 in QAbstractItemModel::rowsInserted(QModelIndex const&, int, int) () from /usr/lib64/libQtCore.so.4
#10 0x00007fe4f278d34c in QAbstractItemModel::endInsertRows() () from /usr/lib64/libQtCore.so.4
#11 0x00007fe4f1edaee3 in ?? () from /usr/lib64/libQtGui.so.4
#12 0x00007fe4f1edbf24 in ?? () from /usr/lib64/libQtGui.so.4
#13 0x00007fe4d8d3ccc6 in Kickoff::FavoritesModel::setNameDisplayOrder(Kickoff::DisplayOrder) () from /usr/lib64/libkickoff.so
#14 0x00007fe4d0c39f11 in ?? () from /usr/lib64/kde4/plasma_applet_launcher.so
#15 0x00007fe4d0c3a21d in ?? () from /usr/lib64/kde4/plasma_applet_launcher.so
#16 0x00007fe4d0c46b27 in ?? () from /usr/lib64/kde4/plasma_applet_launcher.so
#17 0x00007fe4d0c47978 in ?? () from /usr/lib64/kde4/plasma_applet_launcher.so
#18 0x00007fe4d0c48116 in ?? () from /usr/lib64/kde4/plasma_applet_launcher.so
#19 0x00007fe4f279b0cf in QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const () from /usr/lib64/libQtCore.so.4
#20 0x00007fe4f279c580 in QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) () from /usr/lib64/libQtCore.so.4
#21 0x00007fe4d91bdeb4 in ?? () from /usr/lib64/kde4/plasma_applet_simplelauncher.so
#22 0x00007fe4d91c472c in ?? () from /usr/lib64/kde4/plasma_applet_simplelauncher.so
#23 0x00007fe4f27a7def in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#24 0x00007fe4f193b982 in QAction::triggered(bool) () from /usr/lib64/libQtGui.so.4
#25 0x00007fe4f193bb7a in QAction::activate(QAction::ActionEvent) () from /usr/lib64/libQtGui.so.4
#26 0x00007fe4f1d71e63 in ?? () from /usr/lib64/libQtGui.so.4
#27 0x00007fe4f1d77e7a in ?? () from /usr/lib64/libQtGui.so.4
#28 0x00007fe4f3404b1d in KMenu::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libkdeui.so.5
#29 0x00007fe4f1993538 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#30 0x00007fe4f1d7906b in QMenu::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#31 0x00007fe4f1941d14 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#32 0x00007fe4f194aaac in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#33 0x00007fe4f34369e6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#34 0x00007fe4f2792bfc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#35 0x00007fe4f1942d25 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/libQtGui.so.4
#36 0x00007fe4f19c1054 in ?? () from /usr/lib64/libQtGui.so.4
#37 0x00007fe4f19bf4c9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#38 0x00007fe4f19e70f2 in ?? () from /usr/lib64/libQtGui.so.4
#39 0x00007fe4ee03dbd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#40 0x00007fe4ee03e3b0 in ?? () from /lib64/libglib-2.0.so.0
#41 0x00007fe4ee03e650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#42 0x00007fe4f27bd91f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#43 0x00007fe4f19e6d8e in ?? () from /usr/lib64/libQtGui.so.4
#44 0x00007fe4f2792052 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#45 0x00007fe4f2792265 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#46 0x00007fe4f1d755e5 in QMenu::exec(QPoint const&, QAction*) () from /usr/lib64/libQtGui.so.4
#47 0x00007fe4e94f22ef in Plasma::Containment::contextMenuEvent(QGraphicsSceneContextMenuEvent*) () from /usr/lib64/libplasma.so.3
#48 0x00007fe4f1f03a0c in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#49 0x00007fe4f1f2cd23 in QGraphicsScene::contextMenuEvent(QGraphicsSceneContextMenuEvent*) () from /usr/lib64/libQtGui.so.4
#50 0x00007fe4f1f3fe14 in QGraphicsScene::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#51 0x00007fe4f1941d14 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#52 0x00007fe4f194a22a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#53 0x00007fe4f34369e6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#54 0x00007fe4f2792bfc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#55 0x00007fe4f1f52290 in QGraphicsView::contextMenuEvent(QContextMenuEvent*) () from /usr/lib64/libQtGui.so.4
#56 0x00007fe4f1993285 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#57 0x00007fe4f1d37906 in QFrame::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#58 0x00007fe4f1f5a8bb in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#59 0x00007fe4f2792d87 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#60 0x00007fe4f1941ce1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#61 0x00007fe4f194a3eb in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#62 0x00007fe4f34369e6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#63 0x00007fe4f2792bfc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#64 0x00007fe4f19c0e65 in ?? () from /usr/lib64/libQtGui.so.4
#65 0x00007fe4f19bf4c9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#66 0x00007fe4f19e70f2 in ?? () from /usr/lib64/libQtGui.so.4
#67 0x00007fe4ee03dbd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#68 0x00007fe4ee03e3b0 in ?? () from /lib64/libglib-2.0.so.0
#69 0x00007fe4ee03e650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#70 0x00007fe4f27bd91f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#71 0x00007fe4f19e6d8e in ?? () from /usr/lib64/libQtGui.so.4
#72 0x00007fe4f2792052 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#73 0x00007fe4f2792265 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#74 0x00007fe4f27966ab in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#75 0x00007fe4e15d9da8 in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#76 0x00000000004075e9 in _start ()

Report to https://bugs.kde.org