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 2.6.31-17-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was just switching workspace using a shortcut key when the plasma workspace crashed. No sequences of switches, similar to what caused crashes before.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb7796700 (LWP 2388))]

Thread 2 (Thread 0xab51fb70 (LWP 2390)):
#0  0x00538422 in __kernel_vsyscall () from /lib/tls/i686/cmov/libc.so.6
#1  0x00504e15 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:122
#2  0x0061278d in inet_pton4 (src=0xfffffe00 <Address 0xfffffe00 out of bounds>, dst=<value optimized out>) at inet_pton.c:104
#3  0x0015fe67 in QWaitConditionPrivate::wait (this=0x9642f88, mutex=0x340ff4, time=4294967295) at thread/qwaitcondition_unix.cpp:87
#4  QWaitCondition::wait (this=0x9642f88, mutex=0x340ff4, time=4294967295) at thread/qwaitcondition_unix.cpp:159
#5  0x06297922 in QHostInfoAgent::run (this=0x9642f78) at kernel/qhostinfo.cpp:260
#6  0x0015ee32 in QThreadPrivate::start (arg=0x9642f78) at thread/qthread_unix.cpp:188
#7  0x0050080e in start_thread (arg=0xab51fb70) at pthread_create.c:300
#8  0x006057ee in vmsplice () from /lib/tls/i686/cmov/libc.so.6
#9  0x00000000 in ?? ()

Thread 1 (Thread 0xb7796700 (LWP 2388)):
[KCrash Handler]
#5  0x01f4b622 in TaskItemLayout::layoutItems (this=0x9596e48) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:320
#6  0x01f4be2a in TaskItemLayout::insert (this=0x9596e48, index=6, item=0xa2e45c8) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:125
#7  0x01f4c00f in TaskItemLayout::addTaskItem (this=0x9596e48, item=0xa2e45c8) at ../../../../plasma/applets/tasks/taskitemlayout.cpp:82
#8  0x01f58fa2 in TaskGroupItem::itemAdded (this=0x95bd400, groupableItem=0xa281d68) at ../../../../plasma/applets/tasks/taskgroupitem.cpp:477
#9  0x01f59627 in TaskGroupItem::qt_metacall (this=0x95bd400, _c=QMetaObject::InvokeMetaMethod, _id=29, _a=0xbff90f98) at ./taskgroupitem.moc:113
#10 0x00265263 in QMetaObject::activate (sender=0x9596e90, from_signal_index=21, to_signal_index=21, argv=0xbff90f98) at kernel/qobject.cpp:3113
#11 0x00265ec2 in QMetaObject::activate (sender=0x9596e90, m=0x83e7bf4, local_signal_index=0, argv=0xbff90f98) at kernel/qobject.cpp:3187
#12 0x083d9433 in TaskManager::TaskGroup::itemAdded (this=0x9596e90, _t1=0xa281d68) at ./taskgroup.moc:145
#13 0x083d9e8b in TaskManager::TaskGroup::add (this=0x9596e90, item=0xa281d68) at ../../../libs/taskmanager/taskgroup.cpp:138
#14 0x083c1052 in TaskManager::GroupManagerPrivate::addTask (this=0x9577208, task=) at ../../../libs/taskmanager/groupmanager.cpp:290
#15 0x083c1a45 in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x9577208) at ../../../libs/taskmanager/groupmanager.cpp:155
#16 0x083c33be in TaskManager::GroupManager::qt_metacall (this=0x9272998, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbff911ac) at ./groupmanager.moc:108
#17 0x00265263 in QMetaObject::activate (sender=0x9577248, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#18 0x00265ec2 in QMetaObject::activate (sender=0x9577248, m=0x340904, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#19 0x0029f667 in QTimer::timeout (this=0x9577248) at .moc/release-shared/moc_qtimer.cpp:128
#20 0x0026a9ae in QTimer::timerEvent (this=0x9577248, e=0xbff91640) at kernel/qtimer.cpp:261
#21 0x0025f3bf in QObject::event (this=0x9577248, e=0xbff91640) at kernel/qobject.cpp:1075
#22 0x013b4f54 in QApplicationPrivate::notify_helper (this=0x8ffe838, receiver=0x9577248, e=0xbff91640) at kernel/qapplication.cpp:4056
#23 0x013bc67c in QApplication::notify (this=0x8fd7a38, receiver=0x9577248, e=0xbff91640) at kernel/qapplication.cpp:3603
#24 0x010d4bfa in KApplication::notify (this=0x8fd7a38, receiver=0x9577248, event=0xbff91640) at ../../kdeui/kernel/kapplication.cpp:302
#25 0x0024f6cb in QCoreApplication::notifyInternal (this=0x8fd7a38, receiver=0x9577248, event=0xbff91640) at kernel/qcoreapplication.cpp:610
#26 0x0027c7ce in QCoreApplication::sendEvent (this=0x9001244) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#27 QTimerInfoList::activateTimers (this=0x9001244) at kernel/qeventdispatcher_unix.cpp:572
#28 0x0027a0e0 in timerSourceDispatch (source=0x9001210) at kernel/qeventdispatcher_glib.cpp:165
#29 0x0047ce88 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#30 0x00480730 in ?? () from /lib/libglib-2.0.so.0
#31 0x00480863 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#32 0x0027a02c in QEventDispatcherGlib::processEvents (this=0x8ffe628, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#33 0x01455be5 in QGuiEventDispatcherGlib::processEvents (this=0x8ffe628, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x0024dc79 in QEventLoop::processEvents (this=0xbff91904, flags=) at kernel/qeventloop.cpp:149
#35 0x0024e0ca in QEventLoop::exec (this=0xbff91904, flags=...) at kernel/qeventloop.cpp:201
#36 0x0025053f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x013b4dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#38 0x039b980d in kdemain (argc=1, argv=0x8fc0c50) at ../../../../plasma/shells/desktop/main.cpp:50
#39 0x0804dde1 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x8f8b078 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x80511a5 "0") at ../../kinit/kinit.cpp:677
#40 0x0804ea35 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#41 0x0804eeac in handle_requests (waitForPid=<value optimized out>) at ../../kinit/kinit.cpp:1362
#42 0x0804fbaf in main (argc=2, argv=0xbff92164, envp=0xbff92170) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi