Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Wasn't interacting with the computer, but I was watching a video and suddenly received a message that Plasma had crashed. I doubt it's reproducible, but it may have had something to do with a sketchy ethernet cable that's given me trouble during the past few days, and the network-manager plasmoid running in the tray. I don't really have more information than that.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb78bd700 (LWP 1900))]

Thread 2 (Thread 0xab879b70 (LWP 1901)):
#0  0x00915422 in __kernel_vsyscall ()
#1  0x005a7e15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00a3c87d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x00c21e67 in QWaitConditionPrivate::wait (this=0xa303e10, mutex=0xa303e0c, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0xa303e10, mutex=0xa303e0c, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x027c9922 in QHostInfoAgent::run (this=0xa303e00) at kernel/qhostinfo.cpp:260
#6  0x00c20e32 in QThreadPrivate::start (arg=0xa303e00) at thread/qthread_unix.cpp:188
#7  0x005a380e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00a2f8de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb78bd700 (LWP 1900)):
[KCrash Handler]
#6  0x0037fd57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x06d1070e in qt_x11_getX11InfoForWindow (xinfo=0xa49870c, a=...) at kernel/qwidget_x11.cpp:400
#8  0x06d17b4e in QWidgetPrivate::create_sys (this=0xa498618, window=29428103, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x06cd8b1c in QWidget::create (this=0xa4c9780, window=29428103, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x06812c1e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x0680e3f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x0680e4cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00d27263 in QMetaObject::activate (sender=0xa408dd0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00d27ec2 in QMetaObject::activate (sender=0xa408dd0, m=0xe01908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x00d2c387 in QSingleShotTimer::timeout (this=0xa408dd0) at .moc/release-shared/qtimer.moc:76
#16 0x00d2c49c in QSingleShotTimer::timerEvent (this=0xa408dd0) at kernel/qtimer.cpp:298
#17 0x00d213bf in QObject::event (this=0xa408dd0, e=0xbfb837e0) at kernel/qobject.cpp:1075
#18 0x06c81f54 in QApplicationPrivate::notify_helper (this=0x9d04430, receiver=0xa408dd0, e=0xbfb837e0) at kernel/qapplication.cpp:4056
#19 0x06c8967c in QApplication::notify (this=0x9cdd618, receiver=0xa408dd0, e=0xbfb837e0) at kernel/qapplication.cpp:3603
#20 0x00fd7bfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#21 0x00d116cb in QCoreApplication::notifyInternal (this=0x9cdd618, receiver=0xa408dd0, event=0xbfb837e0) at kernel/qcoreapplication.cpp:610
#22 0x00d3e7ce in QCoreApplication::sendEvent (this=0x9d07034) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x9d07034) at kernel/qeventdispatcher_unix.cpp:572
#24 0x00d3c0e0 in timerSourceDispatch (source=0x9d07000) at kernel/qeventdispatcher_glib.cpp:165
#25 0x03ce0e88 in g_main_dispatch (context=0x9d06490) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x9d06490) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#27 0x03ce4730 in g_main_context_iterate (context=0x9d06490, block=<value optimized out>, dispatch=1, self=0x9d03f38) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#28 0x03ce4863 in IA__g_main_context_iteration (context=0x9d06490, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#29 0x00d3c02c in QEventDispatcherGlib::processEvents (this=0x9d04220, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#30 0x06d22be5 in QGuiEventDispatcherGlib::processEvents (this=0x9d04220, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00d0fc79 in QEventLoop::processEvents (this=0xbfb83aa4, flags=) at kernel/qeventloop.cpp:149
#32 0x00d100ca in QEventLoop::exec (this=0xbfb83aa4, flags=...) at kernel/qeventloop.cpp:201
#33 0x00d1253f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x06c81dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x0306980d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#36 0x0804dde1 in _start ()

Reported using DrKonqi