Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.00 (KDE 4.3.0)
Qt Version: 4.5.2
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
The only plasma related thing I think I was doing was switching workspaces with the scroll wheel when plasma crashed

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4091)]

Thread 2 (Thread 0x7f1cb316b950 (LWP 4094)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f1cd32e9d19 in QWaitCondition::wait (this=0x1f4ba50, mutex=0x1f4ba48, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007f1cd217381c in QHostInfoAgent::run (this=0x1f4ba30) at kernel/qhostinfo.cpp:260
#3  0x00007f1cd32e8d35 in QThreadPrivate::start (arg=0x1f4ba30) at thread/qthread_unix.cpp:188
#4  0x00007f1ccf1e23ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007f1ccfdc6fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1cd38ab750 (LWP 4091)):
[KCrash Handler]
#5  AbstractTaskItem::basicPreferredSize (this=0x2504490) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/tasks.h:92
#6  0x00007f1cb5e1e256 in TaskItemLayout::preferredColumns (this=0x1e4a620) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:206
#7  0x00007f1cb5e1ebac in TaskItemLayout::gridLayoutSize (this=0x1e4a620) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:222
#8  0x00007f1cb5e1ec3b in TaskItemLayout::layoutItems (this=0x740066) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:245
#9  0x00007f1cb5e1f5f9 in TaskItemLayout::remove (this=0x1e4a620, item=0x18d5e40) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:136
#10 0x00007f1cb5e1f69e in TaskItemLayout::removeTaskItem (this=0x740066, item=0x7f1ccfe1d528) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:93
#11 0x00007f1cb5e2a679 in TaskGroupItem::itemRemoved (this=0x1f06380, groupableItem=0x251f860) at /build/buildd/kdebase-workspace-4.3.0/plasma/applets/tasks/taskgroupitem.cpp:521
#12 0x00007f1cb5e2ba41 in TaskGroupItem::qt_metacall (this=0x1f06380, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdb8e3ef0)
    at /build/buildd/kdebase-workspace-4.3.0/obj-x86_64-linux-gnu/plasma/applets/tasks/taskgroupitem.moc:114
#13 0x00007f1cd33e7ea2 in QMetaObject::activate (sender=0x1f084b0, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x0) at kernel/qobject.cpp:3113
#14 0x00007f1cb5bf0c82 in TaskManager::TaskGroup::itemRemoved (this=0x740066, _t1=0x251f860) at /build/buildd/kdebase-workspace-4.3.0/obj-x86_64-linux-gnu/libs/taskmanager/taskgroup.moc:146
#15 0x00007f1cb5bf15a1 in TaskManager::TaskGroup::remove (this=0x1f084b0, item=0x251f860) at /build/buildd/kdebase-workspace-4.3.0/libs/taskmanager/taskgroup.cpp:182
#16 0x00007f1cb5bdaaa4 in TaskManager::GroupManagerPrivate::removeTask (this=0x1f074d0, task={d = 0x7fffdb8e3fc0}) at /build/buildd/kdebase-workspace-4.3.0/libs/taskmanager/groupmanager.cpp:311
#17 0x00007f1cb5bdafde in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x1f074d0) at /build/buildd/kdebase-workspace-4.3.0/libs/taskmanager/groupmanager.cpp:164
#18 0x00007f1cb5bdc262 in TaskManager::GroupManager::qt_metacall (this=0x1f0aa00, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdb8e4140)
    at /build/buildd/kdebase-workspace-4.3.0/obj-x86_64-linux-gnu/libs/taskmanager/groupmanager.moc:108
#19 0x00007f1cd33e7ea2 in QMetaObject::activate (sender=0x1f07538, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#20 0x00007f1cd33e2263 in QObject::event (this=0x1f07538, e=0x7f1ccfe1d528) at kernel/qobject.cpp:1075
#21 0x00007f1cd099df4d in QApplicationPrivate::notify_helper (this=0x1673c10, receiver=0x1f07538, e=0x7fffdb8e47f0) at kernel/qapplication.cpp:4056
#22 0x00007f1cd09a618a in QApplication::notify (this=0x1634da0, receiver=0x1f07538, e=0x7fffdb8e47f0) at kernel/qapplication.cpp:4021
#23 0x00007f1cd1ab071b in KApplication::notify (this=0x1634da0, receiver=0x1f07538, event=0x7fffdb8e47f0) at /build/buildd/kde4libs-4.3.0/kdeui/kernel/kapplication.cpp:302
#24 0x00007f1cd33d26ac in QCoreApplication::notifyInternal (this=0x1634da0, receiver=0x1f07538, event=0x7fffdb8e47f0) at kernel/qcoreapplication.cpp:610
#25 0x00007f1cd33ff516 in QTimerInfoList::activateTimers (this=0x16771c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#26 0x00007f1cd33fbb2d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:165
#27 0x00007f1ccf43120a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#28 0x00007f1ccf4348e0 in ?? () from /usr/lib/libglib-2.0.so.0
#29 0x00007f1ccf434a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#30 0x00007f1cd33fba8f in QEventDispatcherGlib::processEvents (this=0x1673740, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#31 0x00007f1cd0a36bdf in QGuiEventDispatcherGlib::processEvents (this=0x740066, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#32 0x00007f1cd33d0f42 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -611431840}) at kernel/qeventloop.cpp:149
#33 0x00007f1cd33d1314 in QEventLoop::exec (this=0x7fffdb8e4aa0, flags={i = -611431760}) at kernel/qeventloop.cpp:201
#34 0x00007f1cd33d35e4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#35 0x00007f1cc73161eb in kdemain (argc=1, argv=0x15e6b50) at /build/buildd/kdebase-workspace-4.3.0/plasma/shells/desktop/main.cpp:50
#36 0x0000000000407215 in launch (argc=1, _name=0x16401c8 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x16401e8 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a3a1 "0") at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:676
#37 0x0000000000407a38 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1168
#38 0x0000000000407fe5 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1361
#39 0x0000000000408b26 in main (argc=2, argv=0x7fffdb8e5948, envp=0x7fffdb8e5960) at /build/buildd/kde4libs-4.3.0/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 203093

Reported using DrKonqi