Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.96 (KDE 4.2.96 (KDE 4.3 RC2))
Qt Version: 4.5.1
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Plasma crash after changing to desktop 3 (of 4) in order to minimise Amarok 2.  Was watching HD video using BBC iPlayer Desktop at the time (unsure if this is relevent).

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4675)]

Thread 2 (Thread 0x7f8842b4b950 (LWP 4677)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f88662aace9 in QWaitCondition::wait (this=0x282bc70, mutex=0x282bc68, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f88651355dc in QHostInfoAgent::run (this=0x282bc50) at kernel/qhostinfo.cpp:260
#3  0x00007f88662a9d02 in QThreadPrivate::start (arg=0x282bc50) at thread/qthread_unix.cpp:189
#4  0x00007f88621793ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f8862d5dfcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f8866866750 (LWP 4675)):
[KCrash Handler]
#5  0x00007f8863efca24 in QGraphicsItem::isWidget (this=0x4eb3620) at graphicsview/qgraphicsitem.cpp:1142
#6  0x00007f8863eff1c9 in QGraphicsItem::isWindow (this=0x4eb3620) at graphicsview/qgraphicsitem.cpp:1156
#7  0x00007f8863f35e41 in QGraphicsScene::event (this=0x1ff2bc0, event=0x7fff6e8a2730) at graphicsview/qgraphicsscene.cpp:3855
#8  0x00007f8863934b9d in QApplicationPrivate::notify_helper (this=0x1e3dc10, receiver=0x1ff2bc0, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4057
#9  0x00007f886393cdea in QApplication::notify (this=0x1dfee40, receiver=0x1ff2bc0, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4022
#10 0x00007f8864a7163b in KApplication::notify (this=0x1dfee40, receiver=0x1ff2bc0, event=0x7fff6e8a37b0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#11 0x00007f8866392dfc in QCoreApplication::notifyInternal (this=0x1dfee40, receiver=0x1ff2bc0, event=0x7fff6e8a37b0) at kernel/qcoreapplication.cpp:610
#12 0x00007f8863f460b6 in QGraphicsView::viewportEvent (this=0x2f31270, event=0x7fff6e8a37b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#13 0x00007f8866392108 in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=<value optimized out>, receiver=0x2e305c0, event=0x7fff6e8a37b0) at kernel/qcoreapplication.cpp:726
#14 0x00007f8863934b6c in QApplicationPrivate::notify_helper (this=0x1e3dc10, receiver=0x2e305c0, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4053
#15 0x00007f886393cdea in QApplication::notify (this=0x1dfee40, receiver=0x2e305c0, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4022
#16 0x00007f8864a7163b in KApplication::notify (this=0x1dfee40, receiver=0x2e305c0, event=0x7fff6e8a37b0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#17 0x00007f8866392dfc in QCoreApplication::notifyInternal (this=0x1dfee40, receiver=0x2e305c0, event=0x7fff6e8a37b0) at kernel/qcoreapplication.cpp:610
#18 0x00007f8863985f5a in QWidget::event (this=0x2f31270, event=0x7fff6e8a37b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 0x00007f8863d2345b in QFrame::event (this=0x2f31270, e=0x7fff6e8a37b0) at widgets/qframe.cpp:559
#20 0x00007f8863db4a89 in QAbstractScrollArea::event (this=0x2f31270, e=0x7fff6e8a37b0) at widgets/qabstractscrollarea.cpp:918
#21 0x00007f8863934b9d in QApplicationPrivate::notify_helper (this=0x1e3dc10, receiver=0x2f31270, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4057
#22 0x00007f886393cdea in QApplication::notify (this=0x1dfee40, receiver=0x2f31270, e=0x7fff6e8a37b0) at kernel/qapplication.cpp:4022
#23 0x00007f8864a7163b in KApplication::notify (this=0x1dfee40, receiver=0x2f31270, event=0x7fff6e8a37b0) at /build/buildd/kde4libs-4.2.96/kdeui/kernel/kapplication.cpp:302
#24 0x00007f8866392dfc in QCoreApplication::notifyInternal (this=0x1dfee40, receiver=0x2f31270, event=0x7fff6e8a37b0) at kernel/qcoreapplication.cpp:610
#25 0x00007f886393b918 in QApplication::setActiveWindow (act=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#26 0x00007f88639a5510 in QApplication::x11ProcessEvent (this=0x1dfee40, event=0x7fff6e8a50e0) at kernel/qapplication_x11.cpp:3485
#27 0x00007f88639cdf84 in x11EventSourceDispatch (s=0x1e41180, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#28 0x00007f88623c820a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#29 0x00007f88623cb8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#30 0x00007f88623cba7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#31 0x00007f88663bc52f in QEventDispatcherGlib::processEvents (this=0x1e3d740, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#32 0x00007f88639cd70f in QGuiEventDispatcherGlib::processEvents (this=0x4eb3620, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#33 0x00007f88663916a2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1854559184}) at kernel/qeventloop.cpp:149
#34 0x00007f8866391a6d in QEventLoop::exec (this=0x7fff6e8a5410, flags={i = 1854559264}) at kernel/qeventloop.cpp:200
#35 0x00007f8866393d34 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#36 0x00007f885a2bc6bb in kdemain (argc=1, argv=0x1daab50) at /build/buildd/kdebase-workspace-4.2.96/plasma/shells/desktop/main.cpp:50
#37 0x0000000000407215 in launch (argc=1, _name=0x1df2548 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x1df2568 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3c9 "0") at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:676
#38 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1168
#39 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1361
#40 0x0000000000408b26 in main (argc=2, argv=0x7fff6e8a62b8, envp=0x7fff6e8a62d0) at /build/buildd/kde4libs-4.2.96/kinit/kinit.cpp:1788

Reported using DrKonqi