Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.31-ARCH x86_64

What I was doing when the application crashed:
when i plugged in my usb hard drive the workspace chrashed, this happened  two times in a row.

 -- Backtrace:
Application: Plasma-Arbeitsfläche (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe78cb64750 (LWP 2700))]

Thread 2 (Thread 0x7fe76dc29910 (LWP 2701)):
#0  0x00007fe78c33bdd9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007fe78c5ab3ab in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007fe788a1665c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007fe78c5aa2e5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007fe78c33757a in start_thread () from /lib/libpthread.so.0
#5  0x00007fe789cf214d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe78cb64750 (LWP 2700)):
[KCrash Handler]
#5  0x00007fe76f96a447 in TaskManager::TaskItem::task() const () from /usr/lib/libtaskmanager.so.4
#6  0x00007fe76fb9c42d in STasksTask::task() () from /usr/lib/kde4/plasma_applet_stasks.so
#7  0x00007fe76fb9a12e in STasksItem::updateState() () from /usr/lib/kde4/plasma_applet_stasks.so
#8  0x00007fe76fb9a641 in STasksItem::STasksItem(TaskManager::AbstractGroupableItem*, STasksApplet*) () from /usr/lib/kde4/plasma_applet_stasks.so
#9  0x00007fe76fb92117 in STasksApplet::itemAdded(TaskManager::AbstractGroupableItem*) () from /usr/lib/kde4/plasma_applet_stasks.so
#10 0x00007fe76fb945e8 in STasksApplet::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/kde4/plasma_applet_stasks.so
#11 0x00007fe78c6a447c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#12 0x00007fe76f967eff in TaskManager::TaskGroup::itemAdded(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#13 0x00007fe76f9687ef in TaskManager::TaskGroup::add(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#14 0x00007fe76f94f2d0 in TaskManager::AbstractGroupingStrategy::createGroup(QList<TaskManager::AbstractGroupableItem*>) () from /usr/lib/libtaskmanager.so.4
#15 0x00007fe76f9573e0 in TaskManager::ProgramGroupingStrategy::programGrouping(TaskManager::TaskItem*, TaskManager::TaskGroup*) () from /usr/lib/libtaskmanager.so.4
#16 0x00007fe76f957e8b in TaskManager::ProgramGroupingStrategy::handleItem(TaskManager::AbstractGroupableItem*) () from /usr/lib/libtaskmanager.so.4
#17 0x00007fe76f95207a in TaskManager::GroupManagerPrivate::addTask(KSharedPtr<TaskManager::Task>) () from /usr/lib/libtaskmanager.so.4
#18 0x00007fe76f9541ba in TaskManager::GroupManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#19 0x00007fe78c6a447c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#20 0x00007fe76f96b3b2 in TaskManager::TaskManager::taskAdded(KSharedPtr<TaskManager::Task>) () from /usr/lib/libtaskmanager.so.4
#21 0x00007fe76f96d3b0 in TaskManager::TaskManager::windowAdded(unsigned long) () from /usr/lib/libtaskmanager.so.4
#22 0x00007fe76f96e6cf in TaskManager::TaskManager::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libtaskmanager.so.4
#23 0x00007fe78c6a447c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#24 0x00007fe78b187a02 in KWindowSystem::windowAdded(unsigned long) () from /usr/lib/libkdeui.so.5
#25 0x00007fe78b18a5ba in KWindowSystemPrivate::addClient(unsigned long) () from /usr/lib/libkdeui.so.5
#26 0x00007fe78b1981ed in NETRootInfo::update(unsigned long const*) () from /usr/lib/libkdeui.so.5
#27 0x00007fe78b198ef1 in NETRootInfo::event(_XEvent*, unsigned long*, int) () from /usr/lib/libkdeui.so.5
#28 0x00007fe78b18aa0c in KWindowSystemPrivate::x11Event(_XEvent*) () from /usr/lib/libkdeui.so.5
#29 0x00007fe78b05ba76 in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5
#30 0x00007fe781137494 in PlasmaApp::x11EventFilter(_XEvent*) () from /usr/lib/libkdeinit4_plasma-desktop.so
#31 0x00007fe78a482a21 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007fe78a493009 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007fe78a4bbefc in ?? () from /usr/lib/libQtGui.so.4
#34 0x00007fe78937c1fe in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0x00007fe78937fbb8 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#36 0x00007fe78937fce0 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0x00007fe78c6b7863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x00007fe78a4bb6de in ?? () from /usr/lib/libQtGui.so.4
#39 0x00007fe78c68dc72 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0x00007fe78c68e044 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0x00007fe78c6901f9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#42 0x00007fe78112384f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0000000000406eae in _start ()

Reported using DrKonqi