Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-15-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Opening the konqueror web browser caused the plasma desktop to crash in KDE 4.3.1

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4730)]

Thread 2 (Thread 0x7f748e625950 (LWP 4731)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f74aec7dd19 in QWaitCondition::wait (this=0x195e1e0, mutex=0x195e1d8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f74adb0381c in QHostInfoAgent::run (this=0x195e1c0) at kernel/qhostinfo.cpp:260
#3  0x00007f74aec7cd35 in QThreadPrivate::start (arg=0x195e1c0) at thread/qthread_unix.cpp:188
#4  0x00007f74aab713ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f74ab755fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f74af247750 (LWP 4730)):
[KCrash Handler]
#5  0x00007f74aedffb5e in typeinfo name for QUtf8Codec () from /usr/lib/libQtCore.so.4
#6  0x00007f74ac8e2afd in QGraphicsItem::setParentItem (this=0x2c9d860, parent=0x1b0d320) at graphicsview/qgraphicsitem.cpp:1044
#7  0x00007f74ac9340db in QGraphicsGridLayout::addItem (this=0x1b12230, item=0x1165250, row=7, column=-1222144368, rowSpan=-1415718256, columnSpan=-23387943, alignment={i = -1222143904})
    at graphicsview/qgraphicsgridlayout.cpp:158
#8  0x00007f748f7c8186 in TaskItemLayout::layoutItems (this=0x1b12230) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:370
#9  0x00007f748f7cfd7b in TaskGroupItem::constraintsChanged (this=0x1b0d310, constraints={i = -1222143664}) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:726
#10 0x00007f748f7d4c5b in TaskGroupItem::qt_metacall (this=0x1b0d310, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffb7279260)
    at /build/buildd/kdebase-workspace-4.3.1/obj-x86_64-linux-gnu/plasma/applets/tasks/taskgroupitem.moc:110
#11 0x00007f74aed7bea2 in QMetaObject::activate (sender=0x1650f60, from_signal_index=<value optimized out>, to_signal_index=36, argv=0x7fffb7278e90) at kernel/qobject.cpp:3113
#12 0x00007f748f7c2c02 in Tasks::constraintsChanged (this=0x7fffb7278e80, _t1=<value optimized out>) at /build/buildd/kdebase-workspace-4.3.1/obj-x86_64-linux-gnu/plasma/applets/tasks/tasks.moc:95
#13 0x00007f748f7c302f in Tasks::constraintsEvent (this=0x1650f60, constraints={i = -1222143104}) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:169
#14 0x00007f74a6686e69 in Plasma::Applet::flushPendingConstraintsEvents (this=0x1650f60) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:1173
#15 0x00007f74a66874b5 in Plasma::Applet::timerEvent (this=0x1650f60, event=<value optimized out>) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:2120
#16 0x00007f74aed76263 in QObject::event (this=0x1650f60, e=0x1165250) at kernel/qobject.cpp:1075
#17 0x00007f74ac91f18b in QGraphicsWidget::event (this=0x1650f60, event=0x7fffb7279b40) at graphicsview/qgraphicswidget.cpp:1340
#18 0x00007f74ac32cf4d in QApplicationPrivate::notify_helper (this=0x11f5ed0, receiver=0x1650f60, e=0x7fffb7279b40) at kernel/qapplication.cpp:4056
#19 0x00007f74ac33518a in QApplication::notify (this=0x11b7060, receiver=0x1650f60, e=0x7fffb7279b40) at kernel/qapplication.cpp:4021
#20 0x00007f74ad43fdeb in KApplication::notify (this=0x11b7060, receiver=0x1650f60, event=0x7fffb7279b40) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#21 0x00007f74aed666ac in QCoreApplication::notifyInternal (this=0x11b7060, receiver=0x1650f60, event=0x7fffb7279b40) at kernel/qcoreapplication.cpp:610
#22 0x00007f74aed93516 in QTimerInfoList::activateTimers (this=0x11f9480) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 0x00007f74aed8fb2d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#24 0x00007f74aadc020a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007f74aadc38e0 in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007f74aadc3a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007f74aed8fa8f in QEventDispatcherGlib::processEvents (this=0x11f5a00, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#28 0x00007f74ac3c5bdf in QGuiEventDispatcherGlib::processEvents (this=0x7fffb7278e80, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x00007f74aed64f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -1222140496}) at kernel/qeventloop.cpp:149
#30 0x00007f74aed65314 in QEventLoop::exec (this=0x7fffb7279df0, flags={i = -1222140416}) at kernel/qeventloop.cpp:201
#31 0x00007f74aed675e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#32 0x00007f74a2ca63eb in kdemain (argc=1, argv=0x11a9c30) at /build/buildd/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#33 0x0000000000407215 in launch (argc=1, _name=0x11aa0d8 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x11aa0f8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3a1 "0") at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:677
#34 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1169
#35 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1362
#36 0x0000000000408b26 in main (argc=2, argv=0x7fffb727ac98, envp=0x7fffb727acb0) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1793

Reported using DrKonqi