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 2.6.30-ARCH i686

What I was doing when the application crashed:
The failure usually happens when I'm using full screen applications, which use flash or using different video channels. Can be played using cinelerra, vlc, firefox, chromium, Arora ... 

The failure is random, not always using the same application or performing the same work.

 -- Backtrace:
Application: Área de trabajo de Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 2293)]

Thread 2 (Thread 0xa6dffb70 (LWP 2296)):
#0  0xb7fb4424 in __kernel_vsyscall ()
#1  0xb7d4abc5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7da9047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb661bc12 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7da8032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7d4668c in start_thread () from /lib/libpthread.so.0
#6  0xb6898e2e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5e9d710 (LWP 2293)):
[KCrash Handler]
#6  0xa83a92bc in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0xa83a526b in TaskItemLayout::preferredColumns () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0xa83a5faa in TaskItemLayout::gridLayoutSize () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0xa83a606b in TaskItemLayout::layoutItems () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0xa83a69a4 in TaskItemLayout::remove () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xa83a6a5c in TaskItemLayout::removeTaskItem () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0xa83b299e in TaskGroupItem::itemRemoved () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0xa83b4177 in TaskGroupItem::qt_metacall () from /usr/lib/kde4/plasma_applet_tasks.so
#14 0xb7eac9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7ead5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xa83807d3 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#17 0xa8380ffb in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#18 0xa836868d in TaskManager::GroupManagerPrivate::removeTask () from /usr/lib/libtaskmanager.so.4
#19 0xa8368b63 in TaskManager::GroupManagerPrivate::actuallyReloadTasks () from /usr/lib/libtaskmanager.so.4
#20 0xa836a2ce in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#21 0xb7eac9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb7ead5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb7ee6a87 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#24 0xb7eb205e in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#25 0xb7ea6b5f in QObject::event () from /usr/lib/libQtCore.so.4
#26 0xb6b23994 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#27 0xb6b2b07c in QApplication::notify () from /usr/lib/libQtGui.so.4
#28 0xb7565faa in KApplication::notify () from /usr/lib/libkdeui.so.5
#29 0xb7e96fcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#30 0xb7ec479e in ?? () from /usr/lib/libQtCore.so.4
#31 0xb7ec1780 in ?? () from /usr/lib/libQtCore.so.4
#32 0xb672dd98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0xb67313e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#34 0xb6731513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0xb7ec16cc in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#36 0xb6bc16c5 in ?? () from /usr/lib/libQtGui.so.4
#37 0xb7e95579 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#38 0xb7e959ca in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#39 0xb7e97e3f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#40 0xb6b23817 in QApplication::exec () from /usr/lib/libQtGui.so.4
#41 0xb39725ad in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#42 0x0804de22 in _start ()

This bug may be a duplicate of or related to bug 204093

Reported using DrKonqi