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

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 4035)]

Thread 2 (Thread 0xa819eb70 (LWP 4036)):
#0  0xb7f56424 in __kernel_vsyscall ()
#1  0xb7cedbc5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7d4c047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb650cbd2 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7d4b032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7ce968c in start_thread () from /lib/libpthread.so.0
#6  0xb6789e2e in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5d82710 (LWP 4035)):
[KCrash Handler]
#6  0xa84062dc in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0xa840228b in TaskItemLayout::preferredColumns () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0xa8402fca in TaskItemLayout::gridLayoutSize () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0xa840308b in TaskItemLayout::layoutItems () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0xa8403bba in TaskItemLayout::insert () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xa8403d9f in TaskItemLayout::addTaskItem () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0xa84101f2 in TaskGroupItem::itemAdded () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0xa8411177 in TaskGroupItem::qt_metacall () from /usr/lib/kde4/plasma_applet_tasks.so
#14 0xb7e4f98c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7e505c2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xa83b0843 in TaskManager::TaskGroup::itemAdded () from /usr/lib/libtaskmanager.so.4
#17 0xa83b1295 in TaskManager::TaskGroup::add () from /usr/lib/libtaskmanager.so.4
#18 0xa839e59c in TaskManager::ProgramGroupingStrategy::handleItem () from /usr/lib/libtaskmanager.so.4
#19 0xa8397f92 in TaskManager::GroupManagerPrivate::addTask () from /usr/lib/libtaskmanager.so.4
#20 0xa83989c5 in TaskManager::GroupManagerPrivate::actuallyReloadTasks () from /usr/lib/libtaskmanager.so.4
#21 0xa839a2ee in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#22 0xb7e4f98c in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb7e505c2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0xb7e89a67 in QTimer::timeout () from /usr/lib/libQtCore.so.4
#25 0xb7e5503e in QTimer::timerEvent () from /usr/lib/libQtCore.so.4
#26 0xb7e49b3f in QObject::event () from /usr/lib/libQtCore.so.4
#27 0xb6a14694 in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#28 0xb6a1bd7c in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0xb7456fca in KApplication::notify () from /usr/lib/libkdeui.so.5
#30 0xb7e39fab in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#31 0xb7e6777e in ?? () from /usr/lib/libQtCore.so.4
#32 0xb7e64760 in ?? () from /usr/lib/libQtCore.so.4
#33 0xb661ed98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb66223e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#35 0xb6622513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb7e646ac in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb6ab2325 in ?? () from /usr/lib/libQtGui.so.4
#38 0xb7e38559 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb7e389aa in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0xb7e3ae1f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#41 0xb6a14517 in QApplication::exec () from /usr/lib/libQtGui.so.4
#42 0xb385db0d in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#43 0x0804de42 in _start ()

Reported using DrKonqi