Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
When I added this plasmoid, there are a crash

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3495)]

Thread 2 (Thread 0xa8976b90 (LWP 3500)):
#0  0xb7fbb430 in __kernel_vsyscall ()
#1  0xb64b10e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb66912ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7dbb2a2 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb76fdae2 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb7dba25e in ?? () from /usr/lib/libQtCore.so.4
#6  0xb64ad4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb668249e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb5fbba10 (LWP 3495)):
[KCrash Handler]
#6  0xb6f7995a in QGraphicsItem::isWidget () from /usr/lib/libQtGui.so.4
#7  0xb6fb3747 in QGraphicsScene::event () from /usr/lib/libQtGui.so.4
#8  0xb6947bcc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#9  0xb694fede in QApplication::notify () from /usr/lib/libQtGui.so.4
#10 0xb74814dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#11 0xb7eae49b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#12 0xb6fc5775 in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#13 0xb6e1e945 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb7ead6ba in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#15 0xb6947baa in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#16 0xb694ffc2 in QApplication::notify () from /usr/lib/libQtGui.so.4
#17 0xb74814dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#18 0xb7eae49b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#19 0xb699e39d in QWidget::event () from /usr/lib/libQtGui.so.4
#20 0xb6d7c2c3 in QFrame::event () from /usr/lib/libQtGui.so.4
#21 0xb6e1ce3d in QAbstractScrollArea::event () from /usr/lib/libQtGui.so.4
#22 0xb6fc46a6 in QGraphicsView::event () from /usr/lib/libQtGui.so.4
#23 0xb6947bcc in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#24 0xb694ffc2 in QApplication::notify () from /usr/lib/libQtGui.so.4
#25 0xb74814dd in KApplication::notify () from /usr/lib/libkdeui.so.5
#26 0xb7eae49b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#27 0xb694eb0b in QApplication::setActiveWindow () from /usr/lib/libQtGui.so.4
#28 0xb69be5dd in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#29 0xb69ea06a in ?? () from /usr/lib/libQtGui.so.4
#30 0xb64fab88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#31 0xb64fe0eb in ?? () from /usr/lib/libglib-2.0.so.0
#32 0xb64fe268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#33 0xb7ed9ec8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#34 0xb69e9765 in ?? () from /usr/lib/libQtGui.so.4
#35 0xb7eacaca in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#36 0xb7eacf0a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#37 0xb7eaf3b9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#38 0xb6947a47 in QApplication::exec () from /usr/lib/libQtGui.so.4
#39 0xb4b115d0 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#40 0x0804e27d in _start ()

Reported using DrKonqi