Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.32-rc5eeepc i686
Distribution: Debian GNU/Linux 5.0.3 (lenny)

What I was doing when the application crashed:
I have desktop effects  enabled, but it also crashes with them disabled.

My preferred desktop has 0 panels, a system tray widget at bottom right, and a digital clock widget at top left.  If I try to add a panel to this setup, plasma crashes.  It does not happen with an empty desktop.  Judging from the backtrace it is related to the System Tray widget.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  QWidget::mapToParent (this=0x0, pos=...) at kernel/qwidget.cpp:3848
#7  0xb62cdc53 in QWidget::mapTo (this=0x800065, parent=0x877dd00, pos=...) at kernel/qwidget.cpp:3804
#8  0xa8ed8b02 in SystemTray::X11EmbedPainter::performUpdates (this=0x818ad28) at ../../../../plasma/applets/systemtray/protocols/fdo/x11embedpainter.cpp:128
#9  0xa8ed902b in SystemTray::X11EmbedPainter::qt_metacall (this=0x818ad28, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfab7dd8) at ./x11embedpainter.moc:69
#10 0xb75f5303 in QMetaObject::activate (sender=0x83669b4, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#11 0xb75f5f42 in QMetaObject::activate (sender=0x83669b4, m=0xb76d1d84, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#12 0xb7630b37 in QTimer::timeout (this=0x83669b4) at .moc/release-shared/moc_qtimer.cpp:128
#13 0xb75fb65e in QTimer::timerEvent (this=0x83669b4, e=0xbfab825c) at kernel/qtimer.cpp:261
#14 0xb75f039f in QObject::event (this=0x83669b4, e=0xbfab825c) at kernel/qobject.cpp:1074
#15 0xb6286a94 in QApplicationPrivate::notify_helper (this=0x80cbf48, receiver=0x83669b4, e=0xbfab825c) at kernel/qapplication.cpp:4065
#16 0xb628ebee in QApplication::notify (this=0x80a5080, receiver=0x83669b4, e=0xbfab825c) at kernel/qapplication.cpp:3605
#17 0xb6cd00fd in KApplication::notify (this=0x80a5080, receiver=0x83669b4, event=0xbfab825c) at ../../kdeui/kernel/kapplication.cpp:302
#18 0xb75e01eb in QCoreApplication::notifyInternal (this=0x80a5080, receiver=0x83669b4, event=0xbfab825c) at kernel/qcoreapplication.cpp:610
#19 0xb760ee21 in QCoreApplication::sendEvent (this=0x80ceb34) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#20 QTimerInfoList::activateTimers (this=0x80ceb34) at kernel/qeventdispatcher_unix.cpp:580
#21 0xb760b317 in timerSourceDispatch (source=0x80ceb70) at kernel/qeventdispatcher_glib.cpp:184
#22 idleTimerSourceDispatch (source=0x80ceb70) at kernel/qeventdispatcher_glib.cpp:231
#23 0xb5e69e98 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#24 0xb5e6d623 in ?? () from /lib/libglib-2.0.so.0
#25 0xb5e6d7a8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#26 0xb760b041 in QEventDispatcherGlib::processEvents (this=0x80cbd38, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#27 0xb6326305 in QGuiEventDispatcherGlib::processEvents (this=0x80cbd38, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#28 0xb75de83a in QEventLoop::processEvents (this=0xbfab8480, flags=...) at kernel/qeventloop.cpp:149
#29 0xb75dec82 in QEventLoop::exec (this=0xbfab8480, flags=...) at kernel/qeventloop.cpp:201
#30 0xb75e10d9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#31 0xb6286917 in QApplication::exec () at kernel/qapplication.cpp:3525
#32 0xb42c9ec0 in kdemain (argc=1, argv=0x8059210) at ../../../../plasma/shells/desktop/main.cpp:50
#33 0x0804e291 in launch (argc=1, _name=0x806cde4 "/usr/bin/plasma-desktop", args=0x806cdfc "", cwd=0x0, envc=0, envs=0x806ce00 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x805109f "0") at ../../kinit/kinit.cpp:677
#34 0x0804ea15 in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#35 0x0804ef3f in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#36 0x0804f6c9 in main (argc=2, argv=0xbfab8d04, envp=0xbfab8d10) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 195206

Reported using DrKonqi