Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-ARCH x86_64

What I was doing when the application crashed:
I have write in konsole

shutdown -h 95

after 5 minutes, kde notification said me something as "the system will be shutdown in 90 minutes", and then, crash of plasma.

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 1925)]

Thread 2 (Thread 0x7f76eb518910 (LWP 1927)):
#0  0x00007f770b404dd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f770b67434b in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2  0x00007f7707ade44c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f770b673285 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f770b40057a in start_thread () from /lib/libpthread.so.0
#5  0x00007f7708dba14d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f770bc25750 (LWP 1925)):
[KCrash Handler]
#5  0x00007f7702f9d6e4 in Plasma::ExtenderItem::group () from /usr/lib/libplasma.so.3
#6  0x00007f7702f9bef8 in Plasma::ExtenderGroup::items () from /usr/lib/libplasma.so.3
#7  0x00007f76ee0f0093 in SystemTray::ExtenderTaskBusyWidget::updateTask () from /usr/lib/kde4/plasma_applet_systemtray.so
#8  0x00007f76ee0f0a80 in SystemTray::ExtenderTaskBusyWidget::qt_metacall () from /usr/lib/kde4/plasma_applet_systemtray.so
#9  0x00007f770b76ddec in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0x00007f76ee0f11c2 in SystemTray::Manager::notificationRemoved () from /usr/lib/kde4/plasma_applet_systemtray.so
#11 0x00007f76ee0f2414 in SystemTray::Manager::qt_metacall () from /usr/lib/kde4/plasma_applet_systemtray.so
#12 0x00007f770b76ddec in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#13 0x00007f76ee0f3367 in SystemTray::Notification::destroyed () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x00007f76ee0f383b in SystemTray::Notification::~Notification () from /usr/lib/kde4/plasma_applet_systemtray.so
#15 0x00007f76ee100d4a in SystemTray::DBusNotification::~DBusNotification () from /usr/lib/kde4/plasma_applet_systemtray.so
#16 0x00007f770b76812d in QObject::event () from /usr/lib/libQtCore.so.4
#17 0x00007f77094f069c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#18 0x00007f77094f796e in QApplication::notify () from /usr/lib/libQtGui.so.4
#19 0x00007f770a1248d6 in KApplication::notify () from /usr/lib/libkdeui.so.5
#20 0x00007f770b758cec in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#21 0x00007f770b7598ca in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#22 0x00007f770b781543 in ?? () from /usr/lib/libQtCore.so.4
#23 0x00007f7708444dbe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#24 0x00007f7708448568 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#25 0x00007f7708448690 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#26 0x00007f770b7811b6 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#27 0x00007f770958364e in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f770b7575f2 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#29 0x00007f770b7579c4 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#30 0x00007f770b759b79 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#31 0x00007f76ff5e028f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#32 0x0000000000406eae in _start ()

Reported using DrKonqi