Application that crashed: kwin
Version of the application: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2)) "release 138"
KDE Version: 4.2.90 (KDE 4.2.90 (KDE 4.3 Beta2)) "release 138"
Qt Version: 4.5.1
Operating System: Linux 2.6.27.23-0.1-default i686
Distribution: "openSUSE 11.1 (i586)"

What I was doing when the application crashed:
I clicked on the Playwolf-Plasmoid and suddenly Plasma crashed. It cannot be restartet: alt+F2 -> Plasma -> no programm appears. All the other programs works (e. g. amarok, ktorrent...) but I have to restart to get the desktop back.

 -- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  0xb2fdd9a7 in KWin::CoverSwitchEffect::tabBoxAdded (this=0x8166fb8, mode=2) at /usr/src/debug/kdebase-workspace-4.2.90/kwin/effects/coverswitch/coverswitch.cpp:550
#7  0xb7f3461f in KWin::EffectsHandlerImpl::tabBoxAdded (this=0x812faa0, mode=2) at /usr/src/debug/kdebase-workspace-4.2.90/kwin/effects.cpp:291
#8  0xb7ec57c5 in KWin::TabBox::show (this=0x8235b48) at /usr/src/debug/kdebase-workspace-4.2.90/kwin/tabbox.cpp:551
#9  0xb7ec5855 in KWin::TabBox::qt_metacall (this=0x8235b48, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfd9d5c8) at /usr/src/debug/kdebase-workspace-4.2.90/build/kwin/tabbox.moc:66
#10 0xb6a6ddc8 in QMetaObject::activate (sender=0x8235b74, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3120
#11 0xb6a6f552 in QMetaObject::activate (sender=0x8235b74, m=0xb6b4e904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3194
#12 0xb6aa9bd7 in QTimer::timeout (this=0x8235b74) at .moc/release-shared/moc_qtimer.cpp:128
#13 0xb6a7388e in QTimer::timerEvent (this=0x8235b74, e=0xbfd9da90) at kernel/qtimer.cpp:261
#14 0xb6a6826f in QObject::event (this=0x8235b74, e=0xbfd9da90) at kernel/qobject.cpp:1082
#15 0xb6ce169c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0xb6ce999e in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0xb7a20b9d in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0xb7ec0f6d in KWin::Application::notify (this=0xbfd9dd94, o=0x8235b74, e=0xbfd9da90) at /usr/src/debug/kdebase-workspace-4.2.90/kwin/main.cpp:370
#19 0xb6a57adb in QCoreApplication::notifyInternal (this=0xbfd9dd94, receiver=0x8235b74, event=0xbfd9da90) at kernel/qcoreapplication.cpp:610
#20 0xb6a87176 in QTimerInfoList::activateTimers (this=0x80689c4) at kernel/qcoreapplication.h:213
#21 0xb6a83600 in timerSourceDispatch (source=0x8068990) at kernel/qeventdispatcher_glib.cpp:164
#22 0xb4d3a9c8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0xb4d3e083 in ?? () from /usr/lib/libglib-2.0.so.0
#24 0xb4d3e241 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0xb6a83558 in QEventDispatcherGlib::processEvents (this=0x804b0b0, flags={i = -1076241352}) at kernel/qeventdispatcher_glib.cpp:324
#26 0xb6d81975 in ?? () from /usr/lib/libQtGui.so.4
#27 0xb6a560fa in QEventLoop::processEvents (this=0xbfd9dce0, flags={i = -1076241240}) at kernel/qeventloop.cpp:149
#28 0xb6a5653a in QEventLoop::exec (this=0xbfd9dce0, flags={i = -1076241176}) at kernel/qeventloop.cpp:200
#29 0xb6a589e9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#30 0xb6ce1517 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#31 0xb7ec36f3 in kdemain (argc=1, argv=0xbfd9df74) at /usr/src/debug/kdebase-workspace-4.2.90/kwin/main.cpp:525
#32 0x080487c2 in main (argc=) at /usr/src/debug/kdebase-workspace-4.2.90/build/kwin/kwin_dummy.cpp:3

Reported using DrKonqi