Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.3 (KDE 4.3.3)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Plasma crashed and restarted after twenty minutes of idle. There was no user activity to prompt the crash. A duplicate of plasma-desktop is listed as stopped under process table.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  0x00267d57 in XVisualIDFromVisual () from /usr/lib/libX11.so.6
#7  0x02fb270e in qt_x11_getX11InfoForWindow (xinfo=0x95c21c4, a=...) at kernel/qwidget_x11.cpp:400
#8  0x02fb9b4e in QWidgetPrivate::create_sys (this=0x95c20d0, window=16945748, initializeWindow=true, destroyOldWindow=true) at kernel/qwidget_x11.cpp:545
#9  0x02f7ab1c in QWidget::create (this=0x9b7ba38, window=16945748, initializeWindow=true, destroyOldWindow=<value optimized out>) at kernel/qwidget.cpp:1253
#10 0x0199ec0e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x0199a3f0 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x0199a4cb in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#13 0x00746263 in QMetaObject::activate (sender=0x9c82d78, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00746ec2 in QMetaObject::activate (sender=0x9c82d78, m=0x820908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#15 0x0074b387 in QSingleShotTimer::timeout (this=0x9c82d78) at .moc/release-shared/qtimer.moc:76
#16 0x0074b49c in QSingleShotTimer::timerEvent (this=0x9c82d78) at kernel/qtimer.cpp:298
#17 0x007403bf in QObject::event (this=0x9c82d78, e=0xbfb50240) at kernel/qobject.cpp:1075
#18 0x02f23f54 in QApplicationPrivate::notify_helper (this=0x900c550, receiver=0x9c82d78, e=0xbfb50240) at kernel/qapplication.cpp:4056
#19 0x02f2b67c in QApplication::notify (this=0x8fe56c0, receiver=0x9c82d78, e=0xbfb50240) at kernel/qapplication.cpp:3603
#20 0x0109a14a in KApplication::notify (this=0x8fe56c0, receiver=0x9c82d78, event=0xbfb50240) at ../../kdeui/kernel/kapplication.cpp:302
#21 0x007306cb in QCoreApplication::notifyInternal (this=0x8fe56c0, receiver=0x9c82d78, event=0xbfb50240) at kernel/qcoreapplication.cpp:610
#22 0x0075d7ce in QCoreApplication::sendEvent (this=0x900f134) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 QTimerInfoList::activateTimers (this=0x900f134) at kernel/qeventdispatcher_unix.cpp:572
#24 0x0075b0e0 in timerSourceDispatch (source=0x900f100) at kernel/qeventdispatcher_glib.cpp:165
#25 0x00ae0e78 in g_main_dispatch (context=0x900dd10) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x900dd10) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2513
#27 0x00ae4720 in g_main_context_iterate (context=0x900dd10, block=<value optimized out>, dispatch=1, self=0x900c028) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2591
#28 0x00ae4853 in IA__g_main_context_iteration (context=0x900dd10, may_block=1) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2654
#29 0x0075b02c in QEventDispatcherGlib::processEvents (this=0x900c310, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#30 0x02fc4be5 in QGuiEventDispatcherGlib::processEvents (this=0x900c310, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x0072ec79 in QEventLoop::processEvents (this=0xbfb50504, flags=) at kernel/qeventloop.cpp:149
#32 0x0072f0ca in QEventLoop::exec (this=0xbfb50504, flags=...) at kernel/qeventloop.cpp:201
#33 0x0073153f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x02f23dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x0177f80d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#36 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x8fd1508 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#37 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#38 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#39 0x0804fbaf in main (argc=2, argv=0xbfb50d64, envp=0xbfb50d70) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi