Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-ARCH i686

What I was doing when the application crashed:
please fix this crash, it is really annoying. if i switch the virtual desktops it crashes. it is very easy to reproduce. if i switch from one virtual desktop to another after five switches plasma will crash.

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 1685)]

Thread 2 (Thread 0xa8aa3b70 (LWP 1704)):
#0  0xb8038424 in __kernel_vsyscall ()
#1  0xb7dd6b95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7e35047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb65f0bd2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7e34032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7dd265c in start_thread () from /lib/libpthread.so.0
#6  0xb686d1fe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5e65700 (LWP 1685)):
[KCrash Handler]
#6  AbstractTaskItem::basicPreferredSize (this=0xb71cf88) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/tasks.h:92
#7  0xa95303fb in TaskItemLayout::preferredColumns (this=0x9a730f0) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:206
#8  0xa953113a in TaskItemLayout::gridLayoutSize (this=0x9a730f0) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:222
#9  0xa95311fb in TaskItemLayout::layoutItems (this=0x9a730f0) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:245
#10 0xa9531d2a in TaskItemLayout::insert (this=0x9a730f0, index=3, item=0xb82b120) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:125
#11 0xa9531f0f in TaskItemLayout::addTaskItem (this=0x9a730f0, item=0xb82b120) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskitemlayout.cpp:82
#12 0xa953f082 in TaskGroupItem::itemAdded (this=0x9d66c48, groupableItem=0xb2ac840) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.cpp:477
#13 0xa953f6f7 in TaskGroupItem::qt_metacall (this=0x9d66c48, _c=QMetaObject::InvokeMetaMethod, _id=29, _a=0xbfe3a2e8)
    at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/applets/tasks/taskgroupitem.moc:113
#14 0xb7f389ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7f395e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xa9573843 in TaskManager::TaskGroup::itemAdded (this=0x9a773a0, _t1=0xb2ac840) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/taskgroup.moc:139
#17 0xa9574295 in TaskManager::TaskGroup::add (this=0x9a773a0, item=0xb2ac840) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/taskgroup.cpp:138
#18 0xa956159c in TaskManager::ProgramGroupingStrategy::handleItem (this=0xb8fa240, item=0xb2ac840)
    at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/strategies/programgroupingstrategy.cpp:154
#19 0xa955af92 in TaskManager::GroupManagerPrivate::addTask (this=0x9bc2d68, task=) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/groupmanager.cpp:288
#20 0xa955b9c5 in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x9bc2d68) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/groupmanager.cpp:155
#21 0xa955d2ee in TaskManager::GroupManager::qt_metacall (this=0x94c6d00, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbfe3a54c)
    at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/libs/taskmanager/groupmanager.moc:108
#22 0xb7f389ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb7f395e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0xb7f72a87 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#25 0xb7f3e05e in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#26 0xb7f32b5f in QObject::event () from /usr/lib/libQtCore.so.4
#27 0xb6af8964 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#28 0xb6b0004c in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0xb753c46a in KApplication::notify (this=0x949aa90, receiver=0x9bc2da8, event=0xbfe3a9e0) at /home/jan/kdemod/core/kdelibs/src/kdelibs-4.3.1/kdeui/kernel/kapplication.cpp:302
#30 0xb7f22fcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#31 0xb7f5079e in ?? () from /usr/lib/libQtCore.so.4
#32 0xb7f4d780 in ?? () from /usr/lib/libQtCore.so.4
#33 0xb6702d98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb67063e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#35 0xb6706513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb7f4d6cc in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb6b96695 in ?? () from /usr/lib/libQtGui.so.4
#38 0xb7f21579 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb7f219ca in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0xb7f23e3f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#41 0xb6af87e7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#42 0xb4957b7d in kdemain (argc=1, argv=0x9430310) at /home/jan/kdemod/core/kdebase-workspace/src/kdebase-workspace-4.3.1/plasma/shells/desktop/main.cpp:50
#43 0x0804de42 in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9432318 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8050f27 "0") at /home/jan/kdemod/core/kdelibs/src/kdelibs-4.3.1/kinit/kinit.cpp:677
#44 0x0804e9ad in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at /home/jan/kdemod/core/kdelibs/src/kdelibs-4.3.1/kinit/kinit.cpp:1169
#45 0x0804ee44 in handle_requests (waitForPid=<value optimized out>) at /home/jan/kdemod/core/kdelibs/src/kdelibs-4.3.1/kinit/kinit.cpp:1362
#46 0x0804f63f in main (argc=2, argv=0xbfe3b5c4, envp=0xbfe3b5d0) at /home/jan/kdemod/core/kdelibs/src/kdelibs-4.3.1/kinit/kinit.cpp:1793

Reported using DrKonqi