Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-16-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I have a tri-head desktop running Xinerama that spans all three monitors.  Within the first 10 minutes of booting plasma always crashes.  It comes back, but it is really irritating.  

This happens almost always when I switch virtual desktops.  I have 12 desktops in three rows.  

Thanks,

Barry

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb785f700 (LWP 1835))]

Thread 2 (Thread 0xab9e0b70 (LWP 1836)):
#0  0x00c24422 in __kernel_vsyscall ()
#1  0x0063de15 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00ba278d in pthread_cond_wait () from /lib/tls/i686/cmov/libc.so.6
#3  0x006d8e67 in QWaitConditionPrivate::wait (this=0x9a537d8, mutex=0x9a537d4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9a537d8, mutex=0x9a537d4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x0694b922 in QHostInfoAgent::run (this=0x9a537c8) at kernel/qhostinfo.cpp:260
#6  0x006d7e32 in QThreadPrivate::start (arg=0x9a537c8) at thread/qthread_unix.cpp:188
#7  0x0063980e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00b957ee in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb785f700 (LWP 1835)):
[KCrash Handler]
#6  Tasks::itemTopMargin (this=0xa8e2f90) at ../../../../plasma/applets/tasks/tasks.h:92
#7  AbstractTaskItem::basicPreferredSize (this=0xa8e2f90) at ../../../../plasma/applets/tasks/abstracttaskitem.cpp:102
#8  0x05b214eb in TaskItemLayout::preferredColumns (this=0x99ce100) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:206
#9  0x05b2223a in TaskItemLayout::gridLayoutSize (this=0x99ce100) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:222
#10 0x05b222fb in TaskItemLayout::layoutItems (this=0x99ce100) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:245
#11 0x05b22e2a in TaskItemLayout::insert (this=0x99ce100, index=0, item=0xa730110) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:125
#12 0x05b2300f in TaskItemLayout::addTaskItem (this=0x99ce100, item=0xa730110) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:82
#13 0x05b2ffa2 in TaskGroupItem::itemAdded (this=0x99d1330, groupableItem=0x9deb290) at ../../../../plasma/applets/tasks/taskgroupitem.cpp:477
#14 0x05b30627 in TaskGroupItem::qt_metacall (this=0x99d1330, _c=QMetaObject::InvokeMetaMethod, _id=29, _a=0xbf99a918) at ./taskgroupitem.moc:113
#15 0x007de263 in QMetaObject::activate (sender=0x98e5940, from_signal_index=21, to_signal_index=21, argv=0xbf99a918) at kernel/qobject.cpp:3113
#16 0x007deec2 in QMetaObject::activate (sender=0x98e5940, m=0x13b3bf4, local_signal_index=0, argv=0xbf99a918) at kernel/qobject.cpp:3187
#17 0x013a5433 in TaskManager::TaskGroup::itemAdded (this=0x98e5940, _t1=0x9deb290) at ./taskgroup.moc:145
#18 0x013a5e8b in TaskManager::TaskGroup::add (this=0x98e5940, item=0x9deb290) at ../../../libs/taskmanager/taskgroup.cpp:138
#19 0x0138d052 in TaskManager::GroupManagerPrivate::addTask (this=0x98e6080, task=) at ../../../libs/taskmanager/groupmanager.cpp:290
#20 0x0138da45 in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x98e6080) at ../../../libs/taskmanager/groupmanager.cpp:155
#21 0x0138f3be in TaskManager::GroupManager::qt_metacall (this=0x991fae8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf99ab2c) at ./groupmanager.moc:108
#22 0x007de263 in QMetaObject::activate (sender=0x98e60c0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#23 0x007deec2 in QMetaObject::activate (sender=0x98e60c0, m=0x8b9904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#24 0x00818667 in QTimer::timeout (this=0x98e60c0) at .moc/release-shared/moc_qtimer.cpp:128
#25 0x007e39ae in QTimer::timerEvent (this=0x98e60c0, e=0xbf99afc0) at kernel/qtimer.cpp:261
#26 0x007d83bf in QObject::event (this=0x98e60c0, e=0xbf99afc0) at kernel/qobject.cpp:1075
#27 0x0172ff54 in QApplicationPrivate::notify_helper (this=0x9689f10, receiver=0x98e60c0, e=0xbf99afc0) at kernel/qapplication.cpp:4056
#28 0x0173767c in QApplication::notify (this=0x9663088, receiver=0x98e60c0, e=0xbf99afc0) at kernel/qapplication.cpp:3603
#29 0x00f68bfa in KApplication::notify (this=0x9663088, receiver=0x98e60c0, event=0xbf99afc0) at ../../kdeui/kernel/kapplication.cpp:302
#30 0x007c86cb in QCoreApplication::notifyInternal (this=0x9663088, receiver=0x98e60c0, event=0xbf99afc0) at kernel/qcoreapplication.cpp:610
#31 0x007f57ce in QCoreApplication::sendEvent (this=0x968c6cc) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#32 QTimerInfoList::activateTimers (this=0x968c6cc) at kernel/qeventdispatcher_unix.cpp:572
#33 0x007f30e0 in timerSourceDispatch (source=0x968c698) at kernel/qeventdispatcher_glib.cpp:165
#34 0x00a16e88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#35 0x00a1a730 in ?? () from /lib/libglib-2.0.so.0
#36 0x00a1a863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#37 0x007f302c in QEventDispatcherGlib::processEvents (this=0x9689d00, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#38 0x017d0be5 in QGuiEventDispatcherGlib::processEvents (this=0x9689d00, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#39 0x007c6c79 in QEventLoop::processEvents (this=0xbf99b284, flags=) at kernel/qeventloop.cpp:149
#40 0x007c70ca in QEventLoop::exec (this=0xbf99b284, flags=...) at kernel/qeventloop.cpp:201
#41 0x007c953f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#42 0x0172fdd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#43 0x0828780d in kdemain (argc=1, argv=0x96101e8) at ../../../../plasma/shells/desktop/main.cpp:50
#44 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9626bf8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#45 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#46 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#47 0x0804fbaf in main (argc=2, argv=0xbf99bae4, envp=0xbf99baf0) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 220878

Reported using DrKonqi