Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.4 (KDE 4.3.4)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-18-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I inserted a USB flash drive, clicked to mount it (which opened Dolphin), copied something to it on the command-line, then in Dolphin I right-clicked the icon and chose Safely Remove, then removed the USB drive.  Shortly thereafter this Crash Reporting Assistant popped up.  I wasn't doing anything else unusual (terminal, Thunderbird, Firefox).

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[Current thread is 1 (Thread 0x7f1a2df25750 (LWP 1832))]

Thread 2 (Thread 0x7f1a13570910 (LWP 1833)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007f1a2d9694fb in QWaitConditionPrivate::wait (this=<value optimized out>, mutex=0x12e28f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (this=<value optimized out>, mutex=0x12e28f8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:159
#3  0x00007f1a29d9c78c in QHostInfoAgent::run (this=0x12e28e0) at kernel/qhostinfo.cpp:260
#4  0x00007f1a2d968445 in QThreadPrivate::start (arg=0x12e28e0) at thread/qthread_unix.cpp:188
#5  0x00007f1a2a6daa04 in start_thread (arg=<value optimized out>) at pthread_create.c:300
#6  0x00007f1a2b2ba80d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f1a2df25750 (LWP 1832)):
[KCrash Handler]
#5  Tasks::itemTopMargin (this=0x2d3f8d0) at ../../../../plasma/applets/tasks/tasks.h:92
#6  AbstractTaskItem::basicPreferredSize (this=0x2d3f8d0) at ../../../../plasma/applets/tasks/abstracttaskitem.cpp:102
#7  0x00007f1a14a9d655 in TaskItemLayout::preferredColumns (this=0x13bd780) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:211
#8  0x00007f1a14a9e3fd in TaskItemLayout::gridLayoutSize (this=0x13bd780) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:227
#9  0x00007f1a14a9e490 in TaskItemLayout::layoutItems (this=0x0) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:250
#10 0x00007f1a14a9ed7b in TaskItemLayout::insert (this=0x13bd780, index=<value optimized out>, item=0x2d37ef0) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:129
#11 0x00007f1a14a9ef70 in TaskItemLayout::addTaskItem (this=0x13bd780, item=0x2d37ef0) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:82
#12 0x00007f1a14aab128 in TaskGroupItem::itemAdded (this=0x13099d0, groupableItem=0x27267b0) at ../../../../plasma/applets/tasks/taskgroupitem.cpp:477
#13 0x00007f1a14aab7b4 in TaskGroupItem::qt_metacall (this=0x13099d0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff51721270) at ./taskgroupitem.moc:113
#14 0x00007f1a2da63ddc in QMetaObject::activate (sender=0x1300410, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xe00000000) at kernel/qobject.cpp:3113
#15 0x00007f1a14ce4d6f in TaskManager::TaskGroup::itemAdded (this=0x0, _t1=0x27267b0) at ./taskgroup.moc:145
#16 0x00007f1a14ce565f in TaskManager::TaskGroup::add (this=0x1300410, item=0x27267b0) at ../../../libs/taskmanager/taskgroup.cpp:138
#17 0x00007f1a14ccc935 in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x2a93b60, group=0x2bcdff0) at ../../../libs/taskmanager/abstractgroupingstrategy.cpp:168
#18 0x00007f1a14cd3a2f in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x2a93b60) at ../../../libs/taskmanager/strategies/programgroupingstrategy.cpp:210
#19 0x00007f1a14cd49bc in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x2a93b60, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff517214d0)
    at ./programgroupingstrategy.moc:70
#20 0x00007f1a2da63ddc in QMetaObject::activate (sender=0x2bcdff0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xe00000000) at kernel/qobject.cpp:3113
#21 0x00007f1a14ce4d32 in TaskManager::TaskGroup::itemRemoved (this=0x0, _t1=0x22f3e50) at ./taskgroup.moc:152
#22 0x00007f1a14ce5411 in TaskManager::TaskGroup::remove (this=0x2bcdff0, item=0x22f3e50) at ../../../libs/taskmanager/taskgroup.cpp:189
#23 0x00007f1a14ccf5ab in TaskManager::GroupManagerPrivate::removeTask (this=0x13035b0, task=) at ../../../libs/taskmanager/groupmanager.cpp:311
#24 0x00007f1a14cd127a in TaskManager::GroupManager::qt_metacall (this=0x122a770, _c=<value optimized out>, _id=<value optimized out>, _a=0x7fff51721710) at ./groupmanager.moc:105
#25 0x00007f1a2da63ddc in QMetaObject::activate (sender=0x1206d20, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xe00000000) at kernel/qobject.cpp:3113
#26 0x00007f1a14ce81e5 in TaskManager::TaskManager::taskRemoved (this=0x0, _t1=<value optimized out>) at ./taskmanager.moc:162
#27 0x00007f1a14ce9dad in TaskManager::TaskManager::windowRemoved (this=0x1206d20, w=60817433) at ../../../libs/taskmanager/taskmanager.cpp:279
#28 0x00007f1a14ceb547 in TaskManager::TaskManager::qt_metacall (this=0x1206d20, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff51721950) at ./taskmanager.moc:110
#29 0x00007f1a2da63ddc in QMetaObject::activate (sender=0x1156980, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0xe00000000) at kernel/qobject.cpp:3113
#30 0x00007f1a2c75dd02 in KWindowSystem::windowRemoved (this=0x0, _t1=60817433) at ./kwindowsystem.moc:127
#31 0x00007f1a2c760afa in KWindowSystemPrivate::removeClient (this=0x1156010, w=60817433) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#32 0x00007f1a2c76e67d in NETRootInfo::update (this=0x1156038, dirty_props=<value optimized out>) at ../../kdeui/windowmanagement/netwm.cpp:2183
#33 0x00007f1a2c76f3b3 in NETRootInfo::event (this=0x1156038, event=<value optimized out>, properties=0x7fff51721c60, properties_size=5) at ../../kdeui/windowmanagement/netwm.cpp:2058
#34 0x00007f1a2c760dac in KWindowSystemPrivate::x11Event (this=0x1156010, ev=0x7fff51723630) at ../../kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#35 0x00007f1a2c6312f6 in KAppX11HackWidget::publicx11Event (this=<value optimized out>, _event=0x7fff51723630) at ../../kdeui/kernel/kapplication.cpp:911
#36 KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fff51723630) at ../../kdeui/kernel/kapplication.cpp:961
#37 0x00007f1a22af4877 in PlasmaApp::x11EventFilter (this=0xec1440, event=0x7fff51723630) at ../../../../plasma/shells/desktop/plasmaapp.cpp:490
#38 0x00007f1a2ba55391 in qt_x11EventFilter (ev=0x7fff51723630) at kernel/qapplication_x11.cpp:375
#39 0x00007f1a2ba65a24 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fff51723630) at kernel/qapplication_x11.cpp:3271
#40 0x00007f1a2ba8fd0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#41 0x00007f1a2a92bbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#42 0x00007f1a2a92f598 in ?? () from /lib/libglib-2.0.so.0
#43 0x00007f1a2a92f6c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#44 0x00007f1a2da771a6 in QEventDispatcherGlib::processEvents (this=0xe3f040, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#45 0x00007f1a2ba8f4be in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#46 0x00007f1a2da4d532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#47 0x00007f1a2da4d904 in QEventLoop::exec (this=0x7fff51723960, flags=) at kernel/qeventloop.cpp:201
#48 0x00007f1a2da4fab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0x00007f1a22ae14cf in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../../../plasma/shells/desktop/main.cpp:50
#50 0x0000000000406da8 in launch (argc=1, _name=<value optimized out>, args=<value optimized out>, cwd=<value optimized out>, envc=0, envs=<value optimized out>, reset_env=false, tty=0x0, 
    avoid_loops=false, startup_id_str=0x40a299 "0") at ../../kinit/kinit.cpp:677
#51 0x0000000000407aa0 in handle_launcher_request (sock=7, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#52 0x0000000000407f51 in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#53 0x0000000000408bb2 in main (argc=2, argv=<value optimized out>, envp=<value optimized out>) at ../../kinit/kinit.cpp:1793
The current source language is "auto; currently asm".
The current source language is "auto; currently c".

Reported using DrKonqi