Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.2 (4.6.2)
Qt Version: 4.7.2
Operating System: Linux 2.6.38-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:

1.) Click on digital clock applet
2.) Calendar applet appears
3.) Click on year and type a number (no numbers visible, plain white field)
4.) Hit "Return" --> Plasma crashes 
5.) Plasme restarts, but taskbar sits in the middle of the screen

Reproducible.

-- Backtrace:
Application: Plasma-Desktop-Umgebung (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe631c16760 (LWP 5306))]

Thread 2 (Thread 0x7fe612fa4700 (LWP 5348)):
#0  0x00007fe62f2e4533 in poll () from /lib/libc.so.6
#1  0x00007fe62c33b134 in ?? () from /usr/lib/libglib-2.0.so.0
#2  0x00007fe62c33b66d in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#3  0x00007fe6308bea66 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#4  0x00007fe630892ca2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007fe630892eec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007fe6307a8494 in QThread::exec() () from /usr/lib/libQtCore.so.4
#7  0x00007fe6308746a8 in ?? () from /usr/lib/libQtCore.so.4
#8  0x00007fe6307aacf5 in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007fe623c38903 in ?? () from /usr/lib/libGL.so.1
#10 0x00007fe630520cb0 in start_thread () from /lib/libpthread.so.0
#11 0x00007fe62f2ec95d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe631c16760 (LWP 5306)):
[KCrash Handler]
#6  0x00007fe630021b5b in QGraphicsLinearLayout::removeItem(QGraphicsLayoutItem*) () from /usr/lib/libQtGui.so.4
#7  0x00007fe615ba18f2 in Plasma::Calendar::hideYearSpinBox() () from /usr/lib/libplasmaclock.so.4
#8  0x00007fe615ba274c in Plasma::Calendar::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasmaclock.so.4
#9  0x00007fe6308a8e0f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#10 0x00007fe62fa8cdac in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#11 0x00007fe62fa3b6a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007fe62fa4026a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#13 0x00007fe631618d36 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#14 0x00007fe63089390c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#15 0x00007fe630022e8a in ?? () from /usr/lib/libQtGui.so.4
#16 0x00007fe630005555 in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#17 0x00007fe6300304a9 in ?? () from /usr/lib/libQtGui.so.4
#18 0x00007fe62fffcaa6 in QGraphicsItemPrivate::setFocusHelper(Qt::FocusReason, bool, bool) () from /usr/lib/libQtGui.so.4
#19 0x00007fe6300308ee in QGraphicsScene::focusNextPrevChild(bool) () from /usr/lib/libQtGui.so.4
#20 0x00007fe63005e050 in QGraphicsWidget::focusNextPrevChild(bool) () from /usr/lib/libQtGui.so.4
#21 0x00007fe63000e9f4 in QGraphicsItemPrivate::setVisibleHelper(bool, bool, bool) () from /usr/lib/libQtGui.so.4
#22 0x00007fe615ba1925 in Plasma::Calendar::hideYearSpinBox() () from /usr/lib/libplasmaclock.so.4
#23 0x00007fe615ba274c in Plasma::Calendar::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libplasmaclock.so.4
#24 0x00007fe6308a8e0f in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#25 0x00007fe62fdfe55c in QAbstractSpinBox::keyPressEvent(QKeyEvent*) () from /usr/lib/libQtGui.so.4
#26 0x00007fe62fa8d170 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#27 0x00007fe62fa3b6a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#28 0x00007fe62fa40992 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#29 0x00007fe631618d36 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#30 0x00007fe63089390c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#31 0x00007fe630022d25 in ?? () from /usr/lib/libQtGui.so.4
#32 0x00007fe6300055ca in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/libQtGui.so.4
#33 0x00007fe63002e394 in QGraphicsScene::keyPressEvent(QKeyEvent*) () from /usr/lib/libQtGui.so.4
#34 0x00007fe630041b52 in QGraphicsScene::event(QEvent*) () from /usr/lib/libQtGui.so.4
#35 0x00007fe62fa3b6a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#36 0x00007fe62fa4026a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#37 0x00007fe631618d36 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#38 0x00007fe63089390c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#39 0x00007fe6300505dd in QGraphicsView::keyPressEvent(QKeyEvent*) () from /usr/lib/libQtGui.so.4
#40 0x00007fe62fa8d170 in QWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#41 0x00007fe62fe37c86 in QFrame::event(QEvent*) () from /usr/lib/libQtGui.so.4
#42 0x00007fe62feb902b in QAbstractScrollArea::event(QEvent*) () from /usr/lib/libQtGui.so.4
#43 0x00007fe62fa3b6a4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#44 0x00007fe62fa40992 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#45 0x00007fe631618d36 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#46 0x00007fe63089390c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#47 0x00007fe62fadceea in ?? () from /usr/lib/libQtGui.so.4
#48 0x00007fe62fadd33f in ?? () from /usr/lib/libQtGui.so.4
#49 0x00007fe62fab9a94 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#50 0x00007fe62fae1392 in ?? () from /usr/lib/libQtGui.so.4
#51 0x00007fe62c33abf3 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#52 0x00007fe62c33b3d0 in ?? () from /usr/lib/libglib-2.0.so.0
#53 0x00007fe62c33b66d in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#54 0x00007fe6308bea0f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#55 0x00007fe62fae103e in ?? () from /usr/lib/libQtGui.so.4
#56 0x00007fe630892ca2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#57 0x00007fe630892eec in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#58 0x00007fe6308973eb in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#59 0x00007fe61ed35ac8 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#60 0x0000000000406b93 in _start ()

Reported using DrKonqi