Version:           Qt: 4.4.3 KDE: 4.1.3 (KDE 4.1.3) Kontact: 1.3  (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

was playing with the "Notebooks" and trying to figure out how
to increase the font size so I could see what I was typing.
tried "Configure Kontact" and Kontact blew up as follows:

Application: Kontact (kontact), signal SIGSEGV
(no debugging symbols found)
(no debugging symbols found)
[Thread debugging using libthread_db enabled]
[New Thread 0x7feb3c5176f0 (LWP 6798)]
[New Thread 0x40a2b950 (LWP 6809)]
[KCrash handler]
#5  0x00007feb3a3cb6ab in QWidget::testAttribute_helper ()
   from /usr/lib/libQtGui.so.4
#6  0x00007feb3a3d514c in QWidgetPrivate::createWinId ()
   from /usr/lib/libQtGui.so.4
#7  0x00007feb3a3d9038 in QWidget::create () from /usr/lib/libQtGui.so.4
#8  0x00007feb3a3d9038 in QWidget::create () from /usr/lib/libQtGui.so.4
#9  0x00007feb3a3d9038 in QWidget::create () from /usr/lib/libQtGui.so.4
#10 0x00007feb3a3d948f in QWidget::winId () from /usr/lib/libQtGui.so.4
#11 0x00007feb20949112 in ?? () from /usr/lib/libknodecommon.so.4
#12 0x00007feb2094c5c8 in ?? () from /usr/lib/libknodecommon.so.4
#13 0x00007feb2094cac8 in ?? () from /usr/lib/libknodecommon.so.4
#14 0x00007feb2094dd03 in ?? () from /usr/lib/libknodecommon.so.4
#15 0x00007feb209497be in ?? () from /usr/lib/libknodecommon.so.4
#16 0x00007feb209ca08a in KNGlobals::accountManager ()
   from /usr/lib/libknodecommon.so.4
#17 0x00007feb2092c811 in KNode::NntpAccountListWidget::load ()
   from /usr/lib/libknodecommon.so.4
#18 0x00007feb20938c17 in KNode::NntpAccountListWidget::NntpAccountListWidget
    () from /usr/lib/libknodecommon.so.4
#19 0x00007feb20c277a2 in ?? () from /usr/lib/kde4/kcm_knode.so
#20 0x00007feb20c27931 in create_knode_config_accounts ()
   from /usr/lib/kde4/kcm_knode.so
#21 0x00007feb364e5d67 in KCModuleLoader::loadModule (mod=@0x362a0a0, 
    report=KCModuleLoader::Inline, parent=0x35e01a0, args=@0x362a070)
    at /build/buildd/kde4libs-4.1.3/kutils/kcmoduleloader.cpp:112
#22 0x00007feb364eb1ea in KCModuleProxyPrivate::loadModule (this=0x362a070)
    at /build/buildd/kde4libs-4.1.3/kutils/kcmoduleproxy.cpp:107
#23 0x00007feb364ec1d5 in KCModuleProxy::realModule (
    this=<value optimized out>)
    at /build/buildd/kde4libs-4.1.3/kutils/kcmoduleproxy.cpp:83
#24 0x00007feb364ec1e9 in KCModuleProxy::minimumSizeHint (this=0x51)
    at /build/buildd/kde4libs-4.1.3/kutils/kcmoduleproxy.cpp:346
#25 0x00007feb3b6fcfb3 in KPageViewPrivate::_k_modelChanged (this=0x33b8bf0)
    at /build/buildd/kde4libs-4.1.3/kdeui/paged/kpageview.cpp:204
#26 0x00007feb3b6fd189 in KPageView::qt_metacall (this=0x3174240, 
    _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, 
    _a=0x7fff44555b30)
    at /build/buildd/kde4libs-4.1.3/obj-x86_64-linux-gnu/kdeui/kpageview.moc:92
#27 0x00007feb3b7003e6 in KPageWidget::qt_metacall (this=0x51, _c=100, _id=2, 
    _a=0x4)
    at /build/buildd/kde4libs-4.1.3/obj-x86_64-linux-gnu/kdeui/kpagewidget.moc:69
#28 0x00007feb3c067134 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#29 0x00007feb364e78a3 in KCMultiDialog::addModule (this=0x2d004c0, 
    moduleInfo=@0x3316110, parentItem=0x314a4f0, args=<value optimized out>)
    at /build/buildd/kde4libs-4.1.3/kutils/kcmultidialog.cpp:298
#30 0x00007feb365004d8 in KSettings::DialogPrivate::createDialogFromServices (
    this=0x22f9360)
    at /build/buildd/kde4libs-4.1.3/kutils/ksettings/dialog.cpp:323
#31 0x00007feb365026e7 in KSettings::Dialog::showEvent (this=0x2d004c0)
    at /build/buildd/kde4libs-4.1.3/kutils/ksettings/dialog.cpp:120
#32 0x00007feb3a3db162 in QWidget::event () from /usr/lib/libQtGui.so.4
#33 0x00007feb3a388c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#34 0x00007feb3a3909ba in QApplication::notify () from /usr/lib/libQtGui.so.4
#35 0x00007feb3b6cefcb in KApplication::notify (this=0x7fff44558650, 
    receiver=0x2d004c0, event=0x7fff44556a70)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#36 0x00007feb3c052d61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#37 0x00007feb3a3ddf51 in QWidgetPrivate::show_helper ()
   from /usr/lib/libQtGui.so.4
#38 0x00007feb3a3de49a in QWidget::setVisible () from /usr/lib/libQtGui.so.4
#39 0x00007feb3a7a2d7c in QDialog::setVisible () from /usr/lib/libQtGui.so.4
#40 0x00007feb3b29918f in Kontact::MainWindow::slotPreferences ()
   from /usr/lib/libkontactprivate.so.4
#41 0x00007feb3b2a1795 in Kontact::MainWindow::qt_metacall ()
   from /usr/lib/libkontactprivate.so.4
#42 0x00007feb3c067134 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#43 0x00007feb3a382f57 in QAction::triggered () from /usr/lib/libQtGui.so.4
#44 0x00007feb3a383720 in QAction::activate () from /usr/lib/libQtGui.so.4
#45 0x00007feb3a71c1ad in ?? () from /usr/lib/libQtGui.so.4
#46 0x00007feb3b78eaa1 in KMenu::mouseReleaseEvent (this=0x1f52e20, 
    e=0x7fff44557810)
    at /build/buildd/kde4libs-4.1.3/kdeui/widgets/kmenu.cpp:452
#47 0x00007feb3a3db329 in QWidget::event () from /usr/lib/libQtGui.so.4
#48 0x00007feb3a71e98b in QMenu::event () from /usr/lib/libQtGui.so.4
#49 0x00007feb3a388c3d in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#50 0x00007feb3a39122a in QApplication::notify () from /usr/lib/libQtGui.so.4
#51 0x00007feb3b6cefcb in KApplication::notify (this=0x7fff44558650, 
    receiver=0x1f52e20, event=0x7fff44557810)
    at /build/buildd/kde4libs-4.1.3/kdeui/kernel/kapplication.cpp:311
#52 0x00007feb3c052d61 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#53 0x00007feb3a3905c8 in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib/libQtGui.so.4
#54 0x00007feb3a3f4da4 in ?? () from /usr/lib/libQtGui.so.4
#55 0x00007feb3a3f3607 in QApplication::x11ProcessEvent ()
   from /usr/lib/libQtGui.so.4
#56 0x00007feb3a41b2c4 in ?? () from /usr/lib/libQtGui.so.4
#57 0x00007feb3928dd3b in g_main_context_dispatch ()
   from /usr/lib/libglib-2.0.so.0
#58 0x00007feb3929150d in ?? () from /usr/lib/libglib-2.0.so.0
#59 0x00007feb392916cb in g_main_context_iteration ()
   from /usr/lib/libglib-2.0.so.0
#60 0x00007feb3c07b15f in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#61 0x00007feb3a41aa6f in ?? () from /usr/lib/libQtGui.so.4
#62 0x00007feb3c051682 in QEventLoop::processEvents ()
   from /usr/lib/libQtCore.so.4
#63 0x00007feb3c05180d in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#64 0x00007feb3c053cbd in QCoreApplication::exec ()
   from /usr/lib/libQtCore.so.4
#65 0x00000000004048e5 in _start ()
#0  0x00007feb39be7621 in nanosleep () from /lib/libc.so.6