Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.3
Operating System: Linux 2.6.32-ARCH x86_64

What I was doing when the application crashed:
What can I say? I'm still fiddling with a new system so it could be anyhting.
Its a Chakra system running Arch and KDE mod on a Compaq presario, and plasma has been producing all kinds of "unexpected" behaviours.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ff3c8620760 (LWP 3777))]

Thread 2 (Thread 0x7ff3a7914710 (LWP 4251)):
#0  0x00007ff3c7dfc07c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ff3c806c3ab in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007ff3c44ca65c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007ff3c806b2e5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007ff3c7df781a in start_thread () from /lib/libpthread.so.0
#5  0x00007ff3c57aac7d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff3c8620760 (LWP 3777)):
[KCrash Handler]
#5  0x00007ff3bf92b9fd in Plasma::ExtenderPrivate::updateBorders() () from /usr/lib/libplasma.so.3
#6  0x00007ff3bf92adae in Plasma::ExtenderPrivate::removeExtenderItem(Plasma::ExtenderItem*) () from /usr/lib/libplasma.so.3
#7  0x00007ff3bf933f18 in Plasma::ExtenderItem::destroy() () from /usr/lib/libplasma.so.3
#8  0x00007ff3bf935e98 in Plasma::ExtenderItem::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasma.so.3
#9  0x00007ff3c816547c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#10 0x00007ff3bf98b5a8 in Plasma::IconWidget::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libplasma.so.3
#11 0x00007ff3c6467319 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007ff3c648cb49 in ?? () from /usr/lib/libQtGui.so.4
#13 0x00007ff3c6495045 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#14 0x00007ff3c6496c0f in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x00007ff3c5ee360c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#16 0x00007ff3c5eea8de in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007ff3c6b17926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x00007ff3c815033c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x00007ff3c64a8e41 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007ff3c5f32060 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007ff3c628b2b6 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007ff3c64a88bb in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007ff3c814f687 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#24 0x00007ff3c5ee35dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#25 0x00007ff3c5eea721 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#26 0x00007ff3c6b17926 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#27 0x00007ff3c815033c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#28 0x00007ff3c5ee9ff0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#29 0x00007ff3c5f4ff94 in ?? () from /usr/lib/libQtGui.so.4
#30 0x00007ff3c5f4ec6a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#31 0x00007ff3c5f76efc in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007ff3c4e2f26e in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0x00007ff3c4e32c28 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#34 0x00007ff3c4e32d50 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0x00007ff3c8178863 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x00007ff3c5f766de in ?? () from /usr/lib/libQtGui.so.4
#37 0x00007ff3c814ec72 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0x00007ff3c814f044 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#39 0x00007ff3c81511f9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#40 0x00007ff3bc9b784f in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#41 0x0000000000406eae in _start ()

Reported using DrKonqi