Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4) "release 2"
Qt Version: 4.6.0
Operating System: Linux 2.6.27.39-0.2-default i686
Distribution: "openSUSE 11.1 (i586)"

What I was doing when the application crashed:
plasma crashed opening window - email mesage in thunderbird this time, but in the past few months it can happen with other windows being opened. black desktop restarts OK. Since other windows open fine, including that message inthunderbird, I cannot recreate it at will.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5447700 (LWP 5198))]

Thread 2 (Thread 0xa7c9cb90 (LWP 5199)):
#0  0xffffe430 in __kernel_vsyscall ()
#1  0xb7435c35 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb74ad1e2 in QWaitCondition::wait (this=0x85d4128, mutex=0x85d4124, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#3  0xb6cf8c82 in QHostInfoAgent::run (this=0x85d4118) at kernel/qhostinfo.cpp:252
#4  0xb74ac2be in QThreadPrivate::start (arg=0x85d4118) at thread/qthread_unix.cpp:244
#5  0xb74321b5 in start_thread () from /lib/libpthread.so.0
#6  0xb5b5e3ae in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5447700 (LWP 5198)):
[KCrash Handler]
#6  0xb64d045c in QGraphicsLayoutItem::geometry (this=0xb76cf410) at graphicsview/qgraphicslayoutitem.cpp:679
#7  0xb65140bf in QGraphicsWidget::size (this=0xb76cf400) at graphicsview/qgraphicswidget.cpp:304
#8  0xa8685e99 in AbstractTaskItem::basicPreferredSize (this=0x8811a78) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/abstracttaskitem.cpp:105
#9  0xa86819e1 in TaskItemLayout::preferredColumns (this=0x85f8bf8) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:211
#10 0xa868246d in TaskItemLayout::gridLayoutSize (this=0x85f8bf8) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:227
#11 0xa868252b in TaskItemLayout::layoutItems (this=0x85f8bf8) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:250
#12 0xa86831ae in TaskItemLayout::insert (this=0x85f8bf8, index=5, item=0x8815510) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:129
#13 0xa86833d7 in TaskItemLayout::addTaskItem (this=0x85f8bf8, item=0x8815510) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskitemlayout.cpp:82
#14 0xa868fff5 in TaskGroupItem::itemAdded (this=0x85f94a8, groupableItem=0x86c1ec0) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/applets/tasks/taskgroupitem.cpp:477
#15 0xa869069c in TaskGroupItem::qt_metacall (this=0x85f94a8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf849f8c)
    at /usr/src/debug/kdebase-workspace-4.3.4/build/plasma/applets/tasks/taskgroupitem.moc:113
#16 0xb75b7d65 in QMetaObject::metacall (object=0x4, cl=QMetaObject::InvokeMetaMethod, idx=39, argv=0xbf849f8c) at kernel/qmetaobject.cpp:237
#17 0xb75c743b in QMetaObject::activate (sender=0x85d2788, m=0xa865bb74, local_signal_index=0, argv=0xbf849f8c) at kernel/qobject.cpp:3294
#18 0xa8646c63 in TaskManager::TaskGroup::itemAdded (this=0x85d2788, _t1=0x86c1ec0) at /usr/src/debug/kdebase-workspace-4.3.4/build/libs/taskmanager/taskgroup.moc:145
#19 0xa86478bb in TaskManager::TaskGroup::add (this=0x85d2788, item=0x86c1ec0) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/taskgroup.cpp:138
#20 0xa862de5a in TaskManager::GroupManagerPrivate::addTask (this=0x85d2b10, task={d = 0xbf84a0b0}) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/groupmanager.cpp:290
#21 0xa8630382 in TaskManager::GroupManager::qt_metacall (this=0x85f7d48, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xbf84a18c)
    at /usr/src/debug/kdebase-workspace-4.3.4/build/libs/taskmanager/groupmanager.moc:103
#22 0xb75b7d65 in QMetaObject::metacall (object=0x4, cl=QMetaObject::InvokeMetaMethod, idx=14, argv=0xbf84a18c) at kernel/qmetaobject.cpp:237
#23 0xb75c743b in QMetaObject::activate (sender=0x85f7d58, m=0xa865bd3c, local_signal_index=0, argv=0xbf84a18c) at kernel/qobject.cpp:3294
#24 0xa864a733 in TaskManager::TaskManager::taskAdded (this=0x85f7d58, _t1={d = 0xbf84a214}) at /usr/src/debug/kdebase-workspace-4.3.4/build/libs/taskmanager/taskmanager.moc:155
#25 0xa864c9c6 in TaskManager::TaskManager::windowAdded (this=0x85f7d58, w=29365485) at /usr/src/debug/kdebase-workspace-4.3.4/libs/taskmanager/taskmanager.cpp:261
#26 0xa864dcd4 in TaskManager::TaskManager::qt_metacall (this=0x85f7d58, _c=QMetaObject::InvokeMetaMethod, _id=6, _a=0xbf84a34c)
    at /usr/src/debug/kdebase-workspace-4.3.4/build/libs/taskmanager/taskmanager.moc:109
#27 0xb75b7d65 in QMetaObject::metacall (object=0x4, cl=QMetaObject::InvokeMetaMethod, idx=10, argv=0xbf84a34c) at kernel/qmetaobject.cpp:237
#28 0xb75c743b in QMetaObject::activate (sender=0x81ba2b8, m=0xb6c2a24c, local_signal_index=1, argv=0xbf84a34c) at kernel/qobject.cpp:3294
#29 0xb6b75813 in KWindowSystem::windowAdded (this=0x81ba2b8, _t1=29365485) at /usr/src/debug/kdelibs-4.3.4/build/kdeui/kwindowsystem.moc:120
#30 0xb6b77e69 in KWindowSystemPrivate::addClient (this=0x8136ed8, w=29365485) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/kwindowsystem_x11.cpp:229
#31 0xb6b86d4d in NETRootInfo::update (this=0x8136eec, dirty_props=0xbf84a4c4) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/netwm.cpp:2186
#32 0xb6b87a0f in NETRootInfo::event (this=0x8136eec, event=0xbf84aaec, properties=0xbf84a5a8, properties_size=5) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/netwm.cpp:2058
#33 0xb6b7827d in KWindowSystemPrivate::x11Event (this=0x8136ed8, ev=0xbf84aa8c) at /usr/src/debug/kdelibs-4.3.4/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#34 0xb6a29bd9 in KApplication::x11EventFilter (this=0x808d920, _event=0xbf84aa8c) at /usr/src/debug/kdelibs-4.3.4/kdeui/kernel/kapplication.cpp:900
#35 0xb38f3517 in PlasmaApp::x11EventFilter (this=0x808d920, event=0xbf84aa8c) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/shells/desktop/plasmaapp.cpp:490
#36 0xb5ecb2de in qt_x11EventFilter (ev=0xbf84aa8c) at kernel/qapplication_x11.cpp:399
#37 0xb5edbbe8 in QApplication::x11ProcessEvent (this=0x808d920, event=0xbf84aa8c) at kernel/qapplication_x11.cpp:3231
#38 0xb5f093e2 in x11EventSourceDispatch (s=0x8095f10, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#39 0xb59d69c8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#40 0xb59da083 in ?? () from /usr/lib/libglib-2.0.so.0
#41 0xb59da241 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#42 0xb75df4a1 in QEventDispatcherGlib::processEvents (this=0x8093088, flags={i = -1081824184}) at kernel/qeventdispatcher_glib.cpp:407
#43 0xb5f08ef5 in QGuiEventDispatcherGlib::processEvents (this=0x8093088, flags={i = -1081824136}) at kernel/qguieventdispatcher_glib.cpp:202
#44 0xb75b0eba in QEventLoop::processEvents (this=0xbf84acf0, flags={i = -1081824072}) at kernel/qeventloop.cpp:149
#45 0xb75b1302 in QEventLoop::exec (this=0xbf84acf0, flags={i = -1081824008}) at kernel/qeventloop.cpp:201
#46 0xb75b3af9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#47 0xb5e4c277 in QApplication::exec () at kernel/qapplication.cpp:3570
#48 0xb38ddae0 in kdemain (argc=1, argv=0x8089b48) at /usr/src/debug/kdebase-workspace-4.3.4/plasma/shells/desktop/main.cpp:50
#49 0x0804e505 in launch (argc=1, _name=0x808aafc "/usr/bin/plasma-desktop", args=0x808ab14 "", cwd=0x0, envc=0, envs=0x808ab18 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051619 "0") at /usr/src/debug/kdelibs-4.3.4/kinit/kinit.cpp:706
#50 0x0804ecdd in handle_launcher_request (sock=7, who=<value optimized out>) at /usr/src/debug/kdelibs-4.3.4/kinit/kinit.cpp:1198
#51 0x0804f173 in handle_requests (waitForPid=0) at /usr/src/debug/kdelibs-4.3.4/kinit/kinit.cpp:1391
#52 0x0804feb2 in main (argc=4, argv=0xbf84b6e4, envp=0xbf84b6f8) at /usr/src/debug/kdelibs-4.3.4/kinit/kinit.cpp:1830

Reported using DrKonqi