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:
working with some windows
plasma often use 100% of my cpu

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3232)]

Thread 2 (Thread 0xa879ab70 (LWP 3233)):
#0  0xb8035424 in __kernel_vsyscall ()
#1  0xb7dd7b95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7e31907 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb66b6212 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7e308f2 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7dd365c in start_thread () from /lib/libpthread.so.0
#6  0xb69321fe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5f3d700 (LWP 3232)):
[KCrash Handler]
#6  0xa93b93cc in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0xa93b53db in TaskItemLayout::preferredColumns () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0xa93b611a in TaskItemLayout::gridLayoutSize () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0xa93b61db in TaskItemLayout::layoutItems () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0xa93b6d0a in TaskItemLayout::insert () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xa93b6eef in TaskItemLayout::addTaskItem () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0xa93c4062 in TaskGroupItem::itemAdded () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0xa93c46d7 in TaskGroupItem::qt_metacall () from /usr/lib/kde4/plasma_applet_tasks.so
#14 0xb7f3526c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7f35ea2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xa93f6823 in TaskManager::TaskGroup::itemAdded () from /usr/lib/libtaskmanager.so.4
#17 0xa93f7275 in TaskManager::TaskGroup::add () from /usr/lib/libtaskmanager.so.4
#18 0xa93e457c in TaskManager::ProgramGroupingStrategy::handleItem () from /usr/lib/libtaskmanager.so.4
#19 0xa93ddf72 in TaskManager::GroupManagerPrivate::addTask () from /usr/lib/libtaskmanager.so.4
#20 0xa93de9a5 in TaskManager::GroupManagerPrivate::actuallyReloadTasks () from /usr/lib/libtaskmanager.so.4
#21 0xa93e02ce in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#22 0xb7f3526c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb7f35ea2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0xb7f6f347 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#25 0xb7f3a91e in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#26 0xb7f2f41f in QObject::event () from /usr/lib/libQtCore.so.4
#27 0xb6bac3e4 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#28 0xb6bb3acc in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0xb75ef43a in KApplication::notify () from /usr/lib/libkdeui.so.5
#30 0xb7f1f88b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#31 0xb7f4d05e in ?? () from /usr/lib/libQtCore.so.4
#32 0xb7f4a040 in ?? () from /usr/lib/libQtCore.so.4
#33 0xb67c7d98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb67cb3e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#35 0xb67cb513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb7f49f8c in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb6c4a115 in ?? () from /usr/lib/libQtGui.so.4
#38 0xb7f1de39 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb7f1e28a in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0xb7f206ff in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#41 0xb6bac267 in QApplication::exec () from /usr/lib/libQtGui.so.4
#42 0xb49a161d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0804de22 in _start ()

This bug may be a duplicate of or related to bug 208936

Reported using DrKonqi