Application: plasma-desktop (0.3)
KDE Platform Version: 4.4.00 (KDE 4.4.0)
Qt Version: 4.6.2
Operating System: Linux 2.6.31.12-174.2.22.fc12.x86_64 x86_64
Distribution (Platform): Fedora RPMs

-- Information about the crash:
After searching for "Padua" and pressing (if I'm not mistaken) "Apply" Plasma crashed.

I could not find any duplicate, but maybe I've not searched enough.

 -- Backtrace:
Application: Spazio di lavoro di Plasma (plasma-desktop), signal: Segmentation fault
82	T_PSEUDO (SYSCALL_SYMBOL, SYSCALL_NAME, SYSCALL_NARGS)
[KCrash Handler]
#5  0x00007f5d1fa57584 in QGraphicsLayoutItem::isLayout (this=0x30b6260) at graphicsview/qgraphicslayoutitem.cpp:804
#6  0x0000003c79dd21e9 in Plasma::TabBar::insertTab (this=0x186a000, index=1, icon=<value optimized out>, label=..., content=0x30b6260) at /usr/src/debug/kdelibs-4.4.0/plasma/widgets/tabbar.cpp:262
#7  0x0000003c79dd2488 in Plasma::TabBar::addTab (this=0x186a000, label=..., content=0x30b6260) at /usr/src/debug/kdelibs-4.4.0/plasma/widgets/tabbar.cpp:308
#8  0x00007f5d05719f14 in WeatherApplet::weatherContent (this=<value optimized out>, data=...) at /usr/src/debug/kdeplasma-addons-4.4.0/applets/weather/weatherapplet.cpp:621
#9  0x00007f5d0571f72d in WeatherApplet::dataUpdated (this=0x1831490, source=..., data=...) at /usr/src/debug/kdeplasma-addons-4.4.0/applets/weather/weatherapplet.cpp:729
#10 0x00007f5d05715603 in WeatherApplet::qt_metacall (this=0x1831490, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff8319f8a0)
    at /usr/src/debug/kdeplasma-addons-4.4.0/x86_64-redhat-linux-gnu/applets/weather/weatherapplet.moc:80
#11 0x00007f5d1ed9b2af in QMetaObject::activate (sender=0x3664ee0, m=<value optimized out>, local_signal_index=<value optimized out>, argv=0x7fff8319f8a0) at kernel/qobject.cpp:3293
#12 0x0000003c79d48627 in Plasma::SignalRelay::dataUpdated (this=<value optimized out>, _t1=..., _t2=) at /usr/src/debug/kdelibs-4.4.0/x86_64-redhat-linux-gnu/plasma/datacontainer_p.moc:85
#13 0x0000003c79d4878e in Plasma::SignalRelay::checkQueueing (this=0x3664ee0) at /usr/src/debug/kdelibs-4.4.0/plasma/private/datacontainer_p.cpp:115
#14 0x0000003c79d15022 in Plasma::DataContainer::checkForUpdate (this=0x35f71a0) at /usr/src/debug/kdelibs-4.4.0/plasma/datacontainer.cpp:170
#15 0x0000003c79d18ee7 in Plasma::DataEngine::timerEvent (this=<value optimized out>, event=<value optimized out>) at /usr/src/debug/kdelibs-4.4.0/plasma/dataengine.cpp:389
#16 0x00007f5d1ed9763e in QObject::event (this=0x1d598b0, e=0x7fff831a0120) at kernel/qobject.cpp:1212
#17 0x00007f5d1f4b19dc in QApplicationPrivate::notify_helper (this=0x136e940, receiver=0x1d598b0, e=0x7fff831a0120) at kernel/qapplication.cpp:4300
#18 0x00007f5d1f4b7aab in QApplication::notify (this=<value optimized out>, receiver=0x1d598b0, e=0x7fff831a0120) at kernel/qapplication.cpp:4183
#19 0x0000003c72a067a6 in KApplication::notify (this=0x1359820, receiver=0x1d598b0, event=0x7fff831a0120) at /usr/src/debug/kdelibs-4.4.0/kdeui/kernel/kapplication.cpp:302
#20 0x00007f5d1ed8874c in QCoreApplication::notifyInternal (this=0x1359820, receiver=0x1d598b0, event=0x7fff831a0120) at kernel/qcoreapplication.cpp:704
#21 0x00007f5d1edb0e02 in sendEvent (this=0x1371f00) at kernel/qcoreapplication.h:215
#22 QTimerInfoList::activateTimers (this=0x1371f00) at kernel/qeventdispatcher_unix.cpp:603
#23 0x00007f5d1edae398 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#24 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#25 0x00000032c5e3920e in g_main_dispatch (context=0x1371120) at gmain.c:1960
#26 IA__g_main_context_dispatch (context=0x1371120) at gmain.c:2513
#27 0x00000032c5e3cbf8 in g_main_context_iterate (context=0x1371120, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#28 0x00000032c5e3cd1a in IA__g_main_context_iteration (context=0x1371120, may_block=1) at gmain.c:2654
#29 0x00007f5d1edae063 in QEventDispatcherGlib::processEvents (this=0x1341510, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#30 0x00007f5d1f550a1e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007f5d1ed87192 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#32 0x00007f5d1ed8745c in QEventLoop::exec (this=0x7fff831a03c0, flags=...) at kernel/qeventloop.cpp:201
#33 0x00007f5d1ed89749 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#34 0x00007f5d211bde52 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.4.0/plasma/desktop/shell/main.cpp:112
#35 0x00000038f381eb1d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=<value optimized out>) at libc-start.c:226
#36 0x00000000004007c9 in _start ()

Reported using DrKonqi