Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.29.6-desktop-1mnb i686
Distribution: "Mandriva Linux 2009.1"

What I was doing when the application crashed:
Just update previous KDE installation with KDE 4.3.0.

Mandriva is the main OS .. Using 2009.1, was adding trash applet to the panel and plasma crashed.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5f179b0 (LWP 6591))]

Thread 3 (Thread 0xa8edcb90 (LWP 6594)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7db8c45 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7e124eb in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb6557c84 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7e113e3 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7db5315 in start_thread () from /lib/libpthread.so.0
#6  0xb67f325e in clone () from /lib/libc.so.6

Thread 2 (Thread 0xa7e08b90 (LWP 25863)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7db8f72 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7e124bf in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb7e0757a in ?? () from /usr/lib/libQtCore.so.4
#4  0xb7e113e3 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7db5315 in start_thread () from /lib/libpthread.so.0
#6  0xb67f325e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5f179b0 (LWP 6591)):
[KCrash Handler]
#6  0xb70a51f7 in QGraphicsItem::isWidget () from /usr/lib/libQtGui.so.4
#7  0xb70a8022 in QGraphicsItem::isWindow () from /usr/lib/libQtGui.so.4
#8  0xb70e149f in QGraphicsScene::event () from /usr/lib/libQtGui.so.4
#9  0xb6a6ab5c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#10 0xb6a732b6 in QApplication::notify () from /usr/lib/libQtGui.so.4
#11 0xb74e596b in KApplication::notify () from /usr/lib/libkdeui.so.5
#12 0xb7f0daee in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#13 0xb70f4220 in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#14 0xb6f3cb06 in ?? () from /usr/lib/libQtGui.so.4
#15 0xb7f0cc8e in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#16 0xb6a6ab2f in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#17 0xb6a733ab in QApplication::notify () from /usr/lib/libQtGui.so.4
#18 0xb74e596b in KApplication::notify () from /usr/lib/libkdeui.so.5
#19 0xb7f0daee in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#20 0xb6ac3a1f in QWidget::event () from /usr/lib/libQtGui.so.4
#21 0xb6e95cc9 in QFrame::event () from /usr/lib/libQtGui.so.4
#22 0xb6f3af7a in QAbstractScrollArea::event () from /usr/lib/libQtGui.so.4
#23 0xb70f0b38 in QGraphicsView::event () from /usr/lib/libQtGui.so.4
#24 0xb6a6ab5c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#25 0xb6a733ab in QApplication::notify () from /usr/lib/libQtGui.so.4
#26 0xb74e596b in KApplication::notify () from /usr/lib/libkdeui.so.5
#27 0xb7f0daee in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#28 0xb6a71d5f in QApplication::setActiveWindow () from /usr/lib/libQtGui.so.4
#29 0xb6ae55b3 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#30 0xb6b103f4 in ?? () from /usr/lib/libQtGui.so.4
#31 0xb6667cea in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#32 0xb666b354 in ?? () from /usr/lib/libglib-2.0.so.0
#33 0xb666b4df in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#34 0xb7f3a6da in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#35 0xb6b0fb4a in ?? () from /usr/lib/libQtGui.so.4
#36 0xb7f0c0b3 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb7f0c50d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#38 0xb7f0ea66 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#39 0xb6a6a9c4 in QApplication::exec () from /usr/lib/libQtGui.so.4
#40 0xb49a820f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#41 0x0804de62 in _start ()

Reported using DrKonqi