Version:           4.0.98-0ubunu1~hardy1~ppa1 (using Devel)
Installed from:    Compiled sources
OS:                Linux

While adding certain plasmoids under KDE4.0.98 with Ubuntu I get a crash report as follows:

Application: Plasma Workspace (plasma), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb550fa00 (LWP 32589)]
[New Thread 0xb2e42b90 (LWP 32592)]
[New Thread 0xb3a20b90 (LWP 32591)]
[KCrash handler]
#6  KConfigGroup::config (this=0xbfc08f28)
    at /build/buildd/kde4libs-4.0.98/kdecore/config/kconfiggroup.cpp:693
#7  0xb7c8972a in Plasma::Applet::saveState (this=0x86fd860, 
    group=@0xbfc08f28)
    at /build/buildd/kdebase-workspace-4.0.98/libs/plasma/applet.cpp:268
#8  0xb7caf905 in Plasma::Containment::addApplet (this=0x80ac108, 
    applet=0x86fd860, pos=@0xbfc08fd8, delayInit=false)
    at /build/buildd/kdebase-workspace-4.0.98/libs/plasma/containment.cpp:586
#9  0xb7cafba7 in Plasma::ContainmentPrivate::addApplet (this=0x812d158, 
    name=@0xbfc090cc, args=@0xbfc090c8, appletGeometry=@0xbfc09098, id=0, 
    delayInit=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.0.98/libs/plasma/containment.cpp:1267
#10 0xb7cafd69 in Plasma::Containment::addApplet (this=0x80ac108, 
    name=@0xbfc090cc, args=@0xbfc090c8, appletGeometry=@0xbfc09098)
    at /build/buildd/kdebase-workspace-4.0.98/libs/plasma/containment.cpp:523
#11 0xb7c90331 in Plasma::AppletBrowserWidget::addApplet (this=0x85e60b8)
    at /build/buildd/kdebase-workspace-4.0.98/libs/plasma/appletbrowser.cpp:244
#12 0xb7c90474 in Plasma::AppletBrowserWidget::qt_metacall (this=0x85e60b8, 
    _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfc091dc)
    at /build/buildd/kdebase-workspace-4.0.98/obj-i486-linux-gnu/libs/plasma/appletbrowser.moc:74
#13 0xb76344f9 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb7634bc2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7c94b73 in KCategorizedItemsView::doubleClicked (this=0x8426c80, 
    _t1=@0x8361d20)
    at /build/buildd/kdebase-workspace-4.0.98/obj-i486-linux-gnu/libs/plasma/kcategorizeditemsview_p.moc:116
#16 0xb7c951c9 in KCategorizedItemsView::qt_metacall (this=0x8426c80, 
    _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfc092dc)
    at /build/buildd/kdebase-workspace-4.0.98/obj-i486-linux-gnu/libs/plasma/kcategorizeditemsview_p.moc:91
#17 0xb76344f9 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#18 0xb7634bc2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#19 0xb7048ee3 in QAbstractItemView::doubleClicked ()
   from /usr/lib/libQtGui.so.4
#20 0xb7092a6b in QTreeView::mouseDoubleClickEvent ()
   from /usr/lib/libQtGui.so.4
#21 0xb6be780f in QWidget::event () from /usr/lib/libQtGui.so.4
#22 0xb6f1c063 in QFrame::event () from /usr/lib/libQtGui.so.4
#23 0xb6fafc0f in QAbstractScrollArea::viewportEvent ()
   from /usr/lib/libQtGui.so.4
#24 0xb7058d38 in QAbstractItemView::viewportEvent ()
   from /usr/lib/libQtGui.so.4
#25 0xb708f4d6 in QTreeView::viewportEvent () from /usr/lib/libQtGui.so.4
#26 0xb6fb0f95 in ?? () from /usr/lib/libQtGui.so.4
#27 0xb761fa21 in QCoreApplicationPrivate::sendThroughObjectEventFilters ()
   from /usr/lib/libQtCore.so.4
#28 0xb6b8fbe3 in QApplicationPrivate::notify_helper ()
   from /usr/lib/libQtGui.so.4
#29 0xb6b94cd5 in QApplication::notify () from /usr/lib/libQtGui.so.4
#30 0xb7aa1603 in KApplication::notify (this=0x8077910, receiver=0x867c1f0, 
    event=0xbfc09c2c)
    at /build/buildd/kde4libs-4.0.98/kdeui/kernel/kapplication.cpp:311
#31 0xb761f6a9 in QCoreApplication::notifyInternal ()
   from /usr/lib/libQtCore.so.4
#32 0xb6b91e21 in QApplicationPrivate::sendMouseEvent ()
   from /usr/lib/libQtGui.so.4
#33 0xb6bfbccd in ?? () from /usr/lib/libQtGui.so.4
#34 0xb6bfa6b1 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#35 0xb6c233ba in ?? () from /usr/lib/libQtGui.so.4
#36 0xb5967bf8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#37 0xb596ae5e in ?? () from /usr/lib/libglib-2.0.so.0
#38 0xb596b3ac in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#39 0xb764af98 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#40 0xb6c231b5 in ?? () from /usr/lib/libQtGui.so.4
#41 0xb761e92d in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#42 0xb761eabd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#43 0xb7620d3d in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#44 0xb6b8f567 in QApplication::exec () from /usr/lib/libQtGui.so.4
#45 0xb7f08236 in kdemain (argc=1, argv=0xbfc0a584)
    at /build/buildd/kdebase-workspace-4.0.98/plasma/plasma/main.cpp:54
#46 0x08048582 in main (argc=)
    at /build/buildd/kdebase-workspace-4.0.98/obj-i486-linux-gnu/plasma/plasma/plasma-qgv_dummy.cpp:3
#0  0xb7f23410 in __kernel_vsyscall ()