Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-hh2 x86_64

What I was doing when the application crashed:
When added kustodian to panel I tried to use it, and then plasma crashed.
I don't know if it is reproducible, while used it since few minutes.

 -- Backtrace:
Application: Przestrzeń robocza Plazmy (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 8445)]

Thread 2 (Thread 0x7f241284e950 (LWP 8686)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f2437b8d749 in QWaitCondition::wait (this=0x3512590, mutex=0x3512588, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f2434312cd4 in QHostInfoAgent::run (this=0x3512570) at kernel/qhostinfo.cpp:260
#3  0x00007f2437b8c9b4 in QThreadPrivate::start (arg=0x3512570) at thread/qthread_unix.cpp:188
#4  0x00007f243791a017 in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f24353f448d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f2438109750 (LWP 8445)):
[KCrash Handler]
#5  0x00007f2435b6828b in QWidget::testAttribute_helper (this=0x0, attribute=Qt::WA_WState_Created) at kernel/qwidget.cpp:9976
#6  0x00007f2435b7614e in QWidget::winId (this=0x0) at ../../include/QtGui/../../src/gui/kernel/qwidget.h:997
#7  0x00007f23fcef76b3 in WindowTaskItem::unHighlightWindow (this=<value optimized out>, caller=0x0)
    at /var/tmp/portage/kde-misc/kustodian-9999/work/kustodian-9999/applets/kustodian/windowtaskitem.cpp:293
#8  0x00007f23fcf0584a in TaskGroupItem::eventFilter (this=0x403f940, watched=0x403f940, event=0x7fff1ad540c0)
    at /var/tmp/portage/kde-misc/kustodian-9999/work/kustodian-9999/applets/kustodian/taskgroupitem.cpp:399
#9  0x00007f2437c60bf8 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x403f940, event=0x7fff1ad540c0) at kernel/qcoreapplication.cpp:726
#10 0x00007f2435b2aeec in QApplicationPrivate::notify_helper (this=0x2598b20, receiver=0x403f940, e=0x7fff1ad540c0) at kernel/qapplication.cpp:4052
#11 0x00007f2435b3397a in QApplication::notify (this=0x258fe30, receiver=0x403f940, e=0x7fff1ad540c0) at kernel/qapplication.cpp:4021
#12 0x00007f243666f61b in KApplication::notify (this=0x258fe30, receiver=0x403f940, event=0x7fff1ad540c0)
    at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:302
#13 0x00007f2437c618cc in QCoreApplication::notifyInternal (this=0x258fe30, receiver=0x403f940, event=0x7fff1ad540c0) at kernel/qcoreapplication.cpp:606
#14 0x00007f243607a2b7 in QGraphicsWidget::sceneEvent (this=0x403f940, event=0x7fff1ad540c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#15 0x00007f24360558fe in QGraphicsScenePrivate::sendHoverEvent (this=0x25ecd70, type=<value optimized out>, item=0x403f950, hoverEvent=0x7fff1ad54270) at graphicsview/qgraphicsscene.cpp:1206
#16 0x00007f243605f0a4 in QGraphicsScenePrivate::dispatchHoverEvent (this=0x25ecd70, hoverEvent=0x7fff1ad54270) at graphicsview/qgraphicsscene.cpp:4247
#17 0x00007f243605f532 in QGraphicsScene::mouseMoveEvent (this=<value optimized out>, mouseEvent=0x7fff1ad54860) at graphicsview/qgraphicsscene.cpp:4414
#18 0x00007f2436060d90 in QGraphicsScene::event (this=0x26b9ce0, event=0x7fff1ad54860) at graphicsview/qgraphicsscene.cpp:3802
#19 0x00007f2435b2af1d in QApplicationPrivate::notify_helper (this=0x2598b20, receiver=0x26b9ce0, e=0x7fff1ad54860) at kernel/qapplication.cpp:4056
#20 0x00007f2435b3397a in QApplication::notify (this=0x258fe30, receiver=0x26b9ce0, e=0x7fff1ad54860) at kernel/qapplication.cpp:4021
#21 0x00007f243666f61b in KApplication::notify (this=0x258fe30, receiver=0x26b9ce0, event=0x7fff1ad54860)
    at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:302
#22 0x00007f2437c618cc in QCoreApplication::notifyInternal (this=0x258fe30, receiver=0x26b9ce0, event=0x7fff1ad54860) at kernel/qcoreapplication.cpp:606
#23 0x00007f2436070790 in QGraphicsViewPrivate::mouseMoveEventHandler (this=0x3a24140, event=0x7fff1ad55300) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 0x00007f243607099e in QGraphicsView::mouseMoveEvent (this=0x0, event=0x7fff1ad55300) at graphicsview/qgraphicsview.cpp:3321
#25 0x00007f2435b7876a in QWidget::event (this=0x3a09890, event=0x7fff1ad55300) at kernel/qwidget.cpp:7534
#26 0x00007f2435e7e3eb in QFrame::event (this=0x3a09890, e=0x7fff1ad55300) at widgets/qframe.cpp:559
#27 0x00007f2436071d1b in QGraphicsView::viewportEvent (this=0x3a09890, event=0x7fff1ad55300) at graphicsview/qgraphicsview.cpp:2919
#28 0x00007f2437c60bf8 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x2782230, event=0x7fff1ad55300) at kernel/qcoreapplication.cpp:726
#29 0x00007f2435b2aeec in QApplicationPrivate::notify_helper (this=0x2598b20, receiver=0x2782230, e=0x7fff1ad55300) at kernel/qapplication.cpp:4052
#30 0x00007f2435b340d9 in QApplication::notify (this=<value optimized out>, receiver=0x2782230, e=0x7fff1ad55300) at kernel/qapplication.cpp:3758
#31 0x00007f243666f61b in KApplication::notify (this=0x258fe30, receiver=0x2782230, event=0x7fff1ad55300)
    at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:302
#32 0x00007f2437c618cc in QCoreApplication::notifyInternal (this=0x258fe30, receiver=0x2782230, event=0x7fff1ad55300) at kernel/qcoreapplication.cpp:606
#33 0x00007f2435b33388 in QApplicationPrivate::sendMouseEvent (receiver=0x2782230, event=0x7fff1ad55300, alienWidget=0x2782230, nativeWidget=0x3a09890, buttonDown=<value optimized out>, 
    lastMouseReceiver=@0x7f2436447ef0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#34 0x00007f2435b8e42c in QETWidget::translateMouseEvent (this=0x3a09890, event=<value optimized out>) at kernel/qapplication_x11.cpp:4404
#35 0x00007f2435b8cf65 in QApplication::x11ProcessEvent (this=0x258fe30, event=0x7fff1ad56cf0) at kernel/qapplication_x11.cpp:3545
#36 0x00007f2435bb2044 in x11EventSourceDispatch (s=0x259bf90, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0x00007f2434a558d1 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#38 0x00007f2434a58fa0 in ?? () from /usr/lib/libglib-2.0.so.0
#39 0x00007f2434a5913c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#40 0x00007f2437c86c4f in QEventDispatcherGlib::processEvents (this=0x2597bc0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#41 0x00007f2435bb18ff in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#42 0x00007f2437c60272 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 450195424}) at kernel/qeventloop.cpp:149
#43 0x00007f2437c6040c in QEventLoop::exec (this=0x7fff1ad57020, flags={i = 450195504}) at kernel/qeventloop.cpp:197
#44 0x00007f2437c624cc in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#45 0x00007f242c5e31ab in kdemain (argc=1, argv=0x253a990) at /var/tmp/portage/kde-base/plasma-workspace-4.3.0/work/plasma-workspace-4.3.0/plasma/shells/desktop/main.cpp:50
#46 0x000000000040739f in launch (argc=1, _name=0x256bf68 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x256bf88 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a283 "0") at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:676
#47 0x0000000000407b78 in handle_launcher_request (sock=8, who=<value optimized out>) at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1168
#48 0x000000000040810e in handle_requests (waitForPid=0) at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1361
#49 0x00000000004087ab in main (argc=2, argv=0x7fff1ad57ea8, envp=0x7fff1ad57ec0) at /var/tmp/portage/kde-base/kdelibs-4.3.0/work/kdelibs-4.3.0/kinit/kinit.cpp:1788

Reported using DrKonqi