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 2.6.31-14-generic-phc x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I opened the starter menu with middle mouse click on the plasma desktop.
Then made a right click on it.
Plasma crashes every time.

 -- Backtrace:
Application: Plasma-Arbeitsfläche (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f640d228750 (LWP 1957))]

Thread 2 (Thread 0x7f63eabba910 (LWP 1960)):
#0  0x00007f64099e15a9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007f640cc674fb in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007f640909e78c in ?? () from /usr/lib/libQtNetwork.so.4
#3  0x00007f640cc66445 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007f64099dca04 in start_thread () from /lib/libpthread.so.0
#5  0x00007f640a5bc7bd in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f640d228750 (LWP 1957)):
[KCrash Handler]
#5  0x00007f640cd58d99 in ?? () from /usr/lib/libQtCore.so.4
#6  0x00007f640cd59582 in QMimeData::data(QString const&) const () from /usr/lib/libQtCore.so.4
#7  0x00007f6404864d87 in ?? () from /usr/lib/libplasma.so.3
#8  0x00007f6404865324 in Plasma::Containment::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libplasma.so.3
#9  0x00007f640b2830e9 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#10 0x00007f640b2a8bc9 in ?? () from /usr/lib/libQtGui.so.4
#11 0x00007f640b2b10d5 in QGraphicsScene::mouseReleaseEvent(QGraphicsSceneMouseEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007f640b2b2c9f in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007f640acfcefc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#14 0x00007f640ad041ce in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#15 0x00007f640b933ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#16 0x00007f640cd4cc2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#17 0x00007f640b2c4eb1 in QGraphicsView::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/libQtGui.so.4
#18 0x00007f640ad4b9c0 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#19 0x00007f640b0a72a6 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007f640b2c492b in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007f640cd4bf47 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#22 0x00007f640acfcecc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#23 0x00007f640ad04011 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#24 0x00007f640b933ab6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#25 0x00007f640cd4cc2c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#26 0x00007f640ad038e0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/libQtGui.so.4
#27 0x00007f640ad69a0e in ?? () from /usr/lib/libQtGui.so.4
#28 0x00007f640ad68aa9 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#29 0x00007f640ad91d0c in ?? () from /usr/lib/libQtGui.so.4
#30 0x00007f6409c2dbbe in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#31 0x00007f6409c31588 in ?? () from /lib/libglib-2.0.so.0
#32 0x00007f6409c316b0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#33 0x00007f640cd751a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#34 0x00007f640ad914be in ?? () from /usr/lib/libQtGui.so.4
#35 0x00007f640cd4b532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#36 0x00007f640cd4b904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#37 0x00007f640cd4dab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#38 0x00007f64010ce4cf in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#39 0x0000000000406da8 in _start ()

Reported using DrKonqi