Application that crashed: kwin
Version of the application: 4.3.4 (KDE 4.3.4)
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.6.0
Operating System: Linux 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was trying to kill dolphin and when I finaly did, kwin crash handler showed up

 -- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
[KCrash Handler]
#6  QProcess::setProcessState (this=0x89dc678, state=QProcess::NotRunning) at io/qprocess.cpp:1698
#7  0x02926d89 in QProcessPrivate::cleanup (this=0x8d73628) at io/qprocess.cpp:770
#8  0x0292af1e in QProcessPrivate::_q_processDied (this=0x8d73628) at io/qprocess.cpp:1030
#9  0x0292b02e in QProcess::qt_metacall (this=0x8e35c88, _c=QMetaObject::InvokeMetaMethod, _id=13, _a=0xbf9a7208) at .moc/release-shared/moc_qprocess.cpp:115
#10 0x0299411a in QMetaObject::metacall (object=0x8e35c88, cl=145, idx=21, argv=0xbf9a7208) at kernel/qmetaobject.cpp:237
#11 0x029a289b in QMetaObject::activate (sender=0x8b074c8, m=0x2aa3550, local_signal_index=0, argv=0xbf9a7208) at kernel/qobject.cpp:3294
#12 0x029f4053 in QSocketNotifier::activated (this=0x8b074c8, _t1=23) at .moc/release-shared/moc_qsocketnotifier.cpp:89
#13 0x029a9e27 in QSocketNotifier::event (this=0x8b074c8, e=0xbf9a7644) at kernel/qsocketnotifier.cpp:317
#14 0x01a3f19c in QApplicationPrivate::notify_helper (this=0x8888808, receiver=0x8b074c8, e=0xbf9a7644) at kernel/qapplication.cpp:4242
#15 0x01a45df7 in QApplication::notify (this=0xbf9a7998, receiver=0x8b074c8, e=0xbf9a7644) at kernel/qapplication.cpp:3661
#16 0x00c921aa in KApplication::notify (this=0xbf9a7998, receiver=0x8b074c8, event=0xbf9a7644) at ../../kdeui/kernel/kapplication.cpp:302
#17 0x00a2d5af in KWin::Application::notify (this=0xbf9a7998, o=0x8b074c8, e=0xbf9a7644) at ../../kwin/main.cpp:366
#18 0x0298eeab in QCoreApplication::notifyInternal (this=0xbf9a7998, receiver=0x8b074c8, event=0xbf9a7644) at kernel/qcoreapplication.cpp:704
#19 0x029bafaa in QCoreApplication::sendEvent (source=0x888b5a8) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#20 socketNotifierSourceDispatch (source=0x888b5a8) at kernel/qeventdispatcher_glib.cpp:110
#21 0x052ade88 in g_main_dispatch (context=0x888ac90) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#22 IA__g_main_context_dispatch (context=0x888ac90) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#23 0x052b1730 in g_main_context_iterate (context=0x888ac90, block=<value optimized out>, dispatch=1, self=0x8888ab0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#24 0x052b1863 in IA__g_main_context_iteration (context=0x888ac90, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#25 0x029babd5 in QEventDispatcherGlib::processEvents (this=0x8883c58, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#26 0x01afcb75 in QGuiEventDispatcherGlib::processEvents (this=0x8883c58, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#27 0x0298d4c9 in QEventLoop::processEvents (this=0xbf9a78e4, flags=) at kernel/qeventloop.cpp:149
#28 0x0298d91a in QEventLoop::exec (this=0xbf9a78e4, flags=...) at kernel/qeventloop.cpp:201
#29 0x02991b0f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#30 0x01a3f237 in QApplication::exec () at kernel/qapplication.cpp:3570
#31 0x00a30174 in kdemain (argc=1, argv=0xbf9a7b94) at ../../kwin/main.cpp:522
#32 0x080485cb in main (argc=1, argv=0xbf9a7b94) at kwin_dummy.cpp:3

Reported using DrKonqi