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 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
no puedo añadir un panel al escritorio ya que se perdio .. se pone negra la pantalla y se reinicia el escritorio o el plasma.. ahora cuando quiero apagar el equipo solo me da la opcion de cerrar secion

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7780700 (LWP 5004))]

Thread 2 (Thread 0xac557b70 (LWP 5010)):
#0  0x0051f422 in __kernel_vsyscall ()
#1  0x0047ae15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x0083e87d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x009a5e67 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#4  0x00c03922 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0x009a4e32 in ?? () from /usr/lib/libQtCore.so.4
#6  0x0047680e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0x008318de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb7780700 (LWP 5004)):
[KCrash Handler]
#6  0x077b9e6d in QWidget::mapToParent(QPoint const&) const () from /usr/lib/libQtGui.so.4
#7  0x077b9eeb in QWidget::mapTo(QWidget*, QPoint const&) const () from /usr/lib/libQtGui.so.4
#8  0x0838e3d6 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#9  0x0838e721 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#10 0x00aab263 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#11 0x00aabec2 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00ae5667 in QTimer::timeout() () from /usr/lib/libQtCore.so.4
#13 0x00ab09ae in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQtCore.so.4
#14 0x00aa53bf in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x07772f54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x0777a67c in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x06c8fbfa in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x00a956cb in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x00ac27ce in ?? () from /usr/lib/libQtCore.so.4
#20 0x00ac00e0 in ?? () from /usr/lib/libQtCore.so.4
#21 0x00558e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#22 0x0055c730 in ?? () from /lib/libglib-2.0.so.0
#23 0x0055c863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#24 0x00ac002c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#25 0x07813be5 in ?? () from /usr/lib/libQtGui.so.4
#26 0x00a93c79 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#27 0x00a940ca in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#28 0x00a9653f in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#29 0x07772dd7 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#30 0x0724e80d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x0804dde1 in _start ()

Reported using DrKonqi