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:
As subject line. Started Claws-mail application, & the plasma desktop crashed

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3361)]

Thread 2 (Thread 0x7f79ee5ff950 (LWP 3362)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f7a0ec57d19 in QWaitCondition::wait (this=0x2a2ecb0, mutex=0x2a2eca8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f7a0dadd81c in QHostInfoAgent::run (this=0x2a2ec90) at kernel/qhostinfo.cpp:260
#3  0x00007f7a0ec56d35 in QThreadPrivate::start (arg=0x2a2ec90) at thread/qthread_unix.cpp:188
#4  0x00007f7a0ab4b3ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f7a0b72ffcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f7a0f221750 (LWP 3361)):
[KCrash Handler]
#5  0x00007f7a0c8a5aa4 in QGraphicsItem::parentItem (this=0x3f0ddc0) at graphicsview/qgraphicsitem.cpp:936
#6  0x00007f7a0c8f3b13 in QGraphicsLayoutPrivate::addChildLayoutItem (this=0x287aca0, layoutItem=<value optimized out>) at graphicsview/qgraphicslayout_p.cpp:162
#7  0x00007f7a0c90e0db in QGraphicsGridLayout::addItem (this=0x287ac40, item=0x287ac40, row=0, column=0, rowSpan=1, columnSpan=1, alignment={i = 388308736})
    at graphicsview/qgraphicsgridlayout.cpp:158
#8  0x00007f79ef7a2186 in TaskItemLayout::layoutItems (this=0x287ac40) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:370
#9  0x00007f79ef7a9d7b in TaskGroupItem::constraintsChanged (this=0x2be05e0, constraints={i = 388308976}) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:726
#10 0x00007f79ef7aec5b in TaskGroupItem::qt_metacall (this=0x2be05e0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff17252100)
    at /build/buildd/kdebase-workspace-4.3.1/obj-x86_64-linux-gnu/plasma/applets/tasks/taskgroupitem.moc:110
#11 0x00007f7a0ed55ea2 in QMetaObject::activate (sender=0x26e41a0, from_signal_index=<value optimized out>, to_signal_index=36, argv=0x0) at kernel/qobject.cpp:3113
#12 0x00007f79ef79cc02 in Tasks::constraintsChanged (this=0x3f0ddc0, _t1=<value optimized out>) at /build/buildd/kdebase-workspace-4.3.1/obj-x86_64-linux-gnu/plasma/applets/tasks/tasks.moc:95
#13 0x00007f79ef79d02f in Tasks::constraintsEvent (this=0x26e41a0, constraints={i = 388309536}) at /build/buildd/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.cpp:169
#14 0x00007f7a06660e69 in Plasma::Applet::flushPendingConstraintsEvents (this=0x26e41a0) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:1173
#15 0x00007f7a066614b5 in Plasma::Applet::timerEvent (this=0x26e41a0, event=<value optimized out>) at /build/buildd/kde4libs-4.3.1/plasma/applet.cpp:2120
#16 0x00007f7a0ed50263 in QObject::event (this=0x26e41a0, e=0x287ac40) at kernel/qobject.cpp:1075
#17 0x00007f7a0c8f918b in QGraphicsWidget::event (this=0x26e41a0, event=0x7fff172529e0) at graphicsview/qgraphicswidget.cpp:1340
#18 0x00007f7a0c306f4d in QApplicationPrivate::notify_helper (this=0x21e0e90, receiver=0x26e41a0, e=0x7fff172529e0) at kernel/qapplication.cpp:4056
#19 0x00007f7a0c30f18a in QApplication::notify (this=0x21a2020, receiver=0x26e41a0, e=0x7fff172529e0) at kernel/qapplication.cpp:4021
#20 0x00007f7a0d419deb in KApplication::notify (this=0x21a2020, receiver=0x26e41a0, event=0x7fff172529e0) at /build/buildd/kde4libs-4.3.1/kdeui/kernel/kapplication.cpp:302
#21 0x00007f7a0ed406ac in QCoreApplication::notifyInternal (this=0x21a2020, receiver=0x26e41a0, event=0x7fff172529e0) at kernel/qcoreapplication.cpp:610
#22 0x00007f7a0ed6d516 in QTimerInfoList::activateTimers (this=0x21e4440) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#23 0x00007f7a0ed69b2d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#24 0x00007f7a0ad9a20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#25 0x00007f7a0ad9d8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#26 0x00007f7a0ad9da7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#27 0x00007f7a0ed69a8f in QEventDispatcherGlib::processEvents (this=0x21e09c0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#28 0x00007f7a0c39fbdf in QGuiEventDispatcherGlib::processEvents (this=0x3f0ddc0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#29 0x00007f7a0ed3ef42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 388312144}) at kernel/qeventloop.cpp:149
#30 0x00007f7a0ed3f314 in QEventLoop::exec (this=0x7fff17252c90, flags={i = 388312224}) at kernel/qeventloop.cpp:201
#31 0x00007f7a0ed415e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#32 0x00007f7a02c803eb in kdemain (argc=1, argv=0x2192840) at /build/buildd/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#33 0x0000000000407215 in launch (argc=1, _name=0x2195098 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x21950b8 "", 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=0x7fff17253b38, envp=0x7fff17253b50) at /build/buildd/kde4libs-4.3.1/kinit/kinit.cpp:1793

Reported using DrKonqi