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 2.6.28-13-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
I was looking for some document in my desktop when i try to preview a folder the crash happens. Also i was updating throw apt.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4060)]

Thread 2 (Thread 0xa9388b90 (LWP 4066)):
#0  0xb8076430 in __kernel_vsyscall ()
#1  0xb658f0e5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0xb676f2ed in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0xb7e76172 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#4  0xb77b2ac2 in ?? () from /usr/lib/libQtNetwork.so.4
#5  0xb7e75132 in ?? () from /usr/lib/libQtCore.so.4
#6  0xb658b4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb676049e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb6098a10 (LWP 4060)):
[KCrash Handler]
#6  0xb7057da8 in QGraphicsScene::drawItems () from /usr/lib/libQtGui.so.4
#7  0xb706d61c in QGraphicsView::drawItems () from /usr/lib/libQtGui.so.4
#8  0xb707a022 in QGraphicsView::paintEvent () from /usr/lib/libQtGui.so.4
#9  0xb6a7c74e in QWidget::event () from /usr/lib/libQtGui.so.4
#10 0xb6e2da53 in QFrame::event () from /usr/lib/libQtGui.so.4
#11 0xb6ecdc2f in QAbstractScrollArea::viewportEvent () from /usr/lib/libQtGui.so.4
#12 0xb70789b2 in QGraphicsView::viewportEvent () from /usr/lib/libQtGui.so.4
#13 0xb6ed0235 in ?? () from /usr/lib/libQtGui.so.4
#14 0xb7f68dea in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/lib/libQtCore.so.4
#15 0xb6a25d1a in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#16 0xb6a2e122 in QApplication::notify () from /usr/lib/libQtGui.so.4
#17 0xb753649d in KApplication::notify () from /usr/lib/libkdeui.so.5
#18 0xb7f69bcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#19 0xb6a30e8e in QCoreApplication::sendSpontaneousEvent () from /usr/lib/libQtGui.so.4
#20 0xb6a844e9 in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#21 0xb6a84c8e in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#22 0xb6a840da in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#23 0xb6a84c8e in QWidgetPrivate::paintSiblingsRecursive () from /usr/lib/libQtGui.so.4
#24 0xb6a840da in QWidgetPrivate::drawWidget () from /usr/lib/libQtGui.so.4
#25 0xb6c159ca in ?? () from /usr/lib/libQtGui.so.4
#26 0xb6a74a06 in QWidgetPrivate::syncBackingStore () from /usr/lib/libQtGui.so.4
#27 0xb6a7cbb5 in QWidget::event () from /usr/lib/libQtGui.so.4
#28 0xb6a25d3c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#29 0xb6a2e122 in QApplication::notify () from /usr/lib/libQtGui.so.4
#30 0xb753649d in KApplication::notify () from /usr/lib/libkdeui.so.5
#31 0xb7f69bcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#32 0xb7f6a825 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#33 0xb7f6aa1d in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#34 0xb7f956af in ?? () from /usr/lib/libQtCore.so.4
#35 0xb65d8b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#36 0xb65dc0eb in ?? () from /usr/lib/libglib-2.0.so.0
#37 0xb65dc268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#38 0xb7f952f8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb6ac7a75 in ?? () from /usr/lib/libQtGui.so.4
#40 0xb7f681fa in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#41 0xb7f68642 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#42 0xb7f6aae9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#43 0xb6a25bb7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#44 0xb4bea2f0 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#45 0x0804e27d in _start ()

Reported using DrKonqi