Application: kwin (4.3.98 (KDE 4.3.98 (KDE 4.4 RC3)) "release 218")
KDE Platform Version: 4.3.98 (KDE 4.3.98 (KDE 4.4 RC3)) "release 218"
Qt Version: 4.6.1
Operating System: Linux 2.6.31.8-0.1-default i686
Distribution: "openSUSE 11.2 (i586)"

-- Information about the crash:
I was switching between two virtual desktop via Ctrl+Tab, directly after this I switched back -> kwin crashed

No Desktop effects are used

 -- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  0xb5d805c1 in typeinfo name for QtSharedPointer::ExternalRefCountData () from /usr/lib/libQtCore.so.4
#7  0xb771e118 in KWin::TabBox::ClientModel::data (this=0x815b258, index=..., role=37) at /usr/src/debug/kdebase-workspace-4.3.98/kwin/tabbox/clientmodel.cpp:77
#8  0xb76c80c6 in KWin::TabBox::TabBoxHandlerPrivate::updateHighlightWindows (this=0x8154288) at /usr/src/debug/kdebase-workspace-4.3.98/kwin/tabbox/tabboxhandler.cpp:237
#9  0xb76e4866 in KWin::TabBox::TabBox::qt_metacall (this=0x8159968, _c=InvokeMetaMethod, _id=4, _a=0xbfee20bc) at /usr/src/debug/kdebase-workspace-4.3.98/build/kwin/tabbox.moc:72
#10 0xb5d0132d in QMetaObject::metacall (object=0x8159968, cl=WriteProperty, idx=4, argv=0xbfee20bc) at kernel/qmetaobject.cpp:237
#11 0xb5d1018a in QMetaObject::activate (sender=0x8159994, m=0xb5e125a4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3275
#12 0xb5d63785 in QTimer::timeout (this=0x8159994) at .moc/release-shared/moc_qtimer.cpp:134
#13 0xb5d18476 in QTimer::timerEvent (this=0x8159994, e=0xbfee2634) at kernel/qtimer.cpp:271
#14 0xb5d0cc94 in QObject::event (this=0x8159994, e=0xb5e100f0) at kernel/qobject.cpp:1212
#15 0xb5fc32ac in QApplicationPrivate::notify_helper (this=0x806a078, receiver=0x8159994, e=0xbfee2634) at kernel/qapplication.cpp:4298
#16 0xb5fca0f8 in QApplication::notify (this=0xbfee2998, receiver=0x8159994, e=0xbfee2634) at kernel/qapplication.cpp:4181
#17 0xb72b6281 in KApplication::notify (this=0xbfee2998, receiver=0x8159994, event=0xbfee2634) at /usr/src/debug/kdelibs-4.3.98/kdeui/kernel/kapplication.cpp:302
#18 0xb76c599f in KWin::Application::notify (this=0xbfee2998, o=0x8159994, e=0xbfee2634) at /usr/src/debug/kdebase-workspace-4.3.98/kwin/main.cpp:370
#19 0xb5cfbfbe in QCoreApplication::notifyInternal (this=0xbfee2998, receiver=0x8159994, event=0xbfee2634) at kernel/qcoreapplication.cpp:704
#20 0xb5d2c1fe in sendEvent (event=<value optimized out>, receiver=<value optimized out>) at kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (event=<value optimized out>, receiver=<value optimized out>) at kernel/qeventdispatcher_unix.cpp:617
#22 0xb5d28e95 in timerSourceDispatch (source=0x806d268) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=0x806d268) at kernel/qeventdispatcher_glib.cpp:231
#24 0xb40f14c2 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0xb40f4d98 in ?? () from /usr/lib/libglib-2.0.so.0
#26 0xb40f4ebe in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0xb5d28b31 in QEventDispatcherGlib::processEvents (this=0x8054cf0, flags=...) at kernel/qeventdispatcher_glib.cpp:412
#28 0xb60836ca in QGuiEventDispatcherGlib::processEvents (this=0x8054cf0, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#29 0xb5cfa62d in QEventLoop::processEvents (this=0xbfee28e4, flags=) at kernel/qeventloop.cpp:149
#30 0xb5cfaa79 in QEventLoop::exec (this=0xbfee28e4, flags=...) at kernel/qeventloop.cpp:201
#31 0xb5cfebf0 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#32 0xb5fc3354 in QApplication::exec () at kernel/qapplication.cpp:3577
#33 0xb77630e5 in kdemain (argc=3, argv=0xbfee2b94) at /usr/src/debug/kdebase-workspace-4.3.98/kwin/main.cpp:526
#34 0x080485fb in main (argc=3, argv=0xbfee2b94) at /usr/src/debug/kdebase-workspace-4.3.98/build/kwin/kwin_dummy.cpp:3

Reported using DrKonqi