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:
Just crush (:

 -- Backtrace:
Application: Рабочее пространство Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 1912)]

Thread 2 (Thread 0xa7c57b70 (LWP 1915)):
#0  0xb7f45424 in __kernel_vsyscall ()
#1  0xb7cdbb95 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#2  0xb7d3a047 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb65acc12 in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7d39032 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7cd765c in start_thread () from /lib/libpthread.so.0
#6  0xb68291fe in clone () from /lib/libc.so.6

Thread 1 (Thread 0xb5e3c700 (LWP 1912)):
[KCrash Handler]
#6  0xa92a62bc in AbstractTaskItem::basicPreferredSize () from /usr/lib/kde4/plasma_applet_tasks.so
#7  0xa92a226b in TaskItemLayout::preferredColumns () from /usr/lib/kde4/plasma_applet_tasks.so
#8  0xa92a2faa in TaskItemLayout::gridLayoutSize () from /usr/lib/kde4/plasma_applet_tasks.so
#9  0xa92a306b in TaskItemLayout::layoutItems () from /usr/lib/kde4/plasma_applet_tasks.so
#10 0xa92a3b9a in TaskItemLayout::insert () from /usr/lib/kde4/plasma_applet_tasks.so
#11 0xa92a3d7f in TaskItemLayout::addTaskItem () from /usr/lib/kde4/plasma_applet_tasks.so
#12 0xa92b01d2 in TaskGroupItem::itemAdded () from /usr/lib/kde4/plasma_applet_tasks.so
#13 0xa92b1157 in TaskGroupItem::qt_metacall () from /usr/lib/kde4/plasma_applet_tasks.so
#14 0xb7e3d9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7e3e5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xa927d823 in TaskManager::TaskGroup::itemAdded () from /usr/lib/libtaskmanager.so.4
#17 0xa927e275 in TaskManager::TaskGroup::add () from /usr/lib/libtaskmanager.so.4
#18 0xa926247e in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#19 0xa9269ddd in TaskManager::ProgramGroupingStrategy::checkGroup () from /usr/lib/libtaskmanager.so.4
#20 0xa926aab1 in TaskManager::ProgramGroupingStrategy::qt_metacall () from /usr/lib/libtaskmanager.so.4
#21 0xb7e3d9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb7e3e5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xa927d7d3 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#24 0xa927dffb in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#25 0xa926568d in TaskManager::GroupManagerPrivate::removeTask () from /usr/lib/libtaskmanager.so.4
#26 0xa926743b in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#27 0xb7e3d9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#28 0xb7e3e5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#29 0xa92811e3 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#30 0xa9282f57 in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#31 0xa928487f in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#32 0xb7e3d9ac in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#33 0xb7e3e5e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#34 0xb76452b3 in KWindowSystem::windowRemoved () from /usr/lib/libkdeui.so.5
#35 0xb7648556 in KWindowSystemPrivate::removeClient () from /usr/lib/libkdeui.so.5
#36 0xb765696f in NETRootInfo::update () from /usr/lib/libkdeui.so.5
#37 0xb76574b2 in NETRootInfo::event () from /usr/lib/libkdeui.so.5
#38 0xb76487f1 in KWindowSystemPrivate::x11Event () from /usr/lib/libkdeui.so.5
#39 0xb74f6356 in KApplication::x11EventFilter () from /usr/lib/libkdeui.so.5
#40 0xb493937f in PlasmaApp::x11EventFilter () from /usr/lib/libkdeinit4_plasma-desktop.so
#41 0xb6b15ee0 in ?? () from /usr/lib/libQtGui.so.4
#42 0xb6b270ce in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#43 0xb6b297a2 in ?? () from /usr/lib/libQtGui.so.4
#44 0xb6b28915 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#45 0xb6b52f92 in ?? () from /usr/lib/libQtGui.so.4
#46 0xb66bed98 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#47 0xb66c23e0 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#48 0xb66c2513 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#49 0xb7e526cc in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#50 0xb6b526c5 in ?? () from /usr/lib/libQtGui.so.4
#51 0xb7e26579 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#52 0xb7e269ca in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#53 0xb7e28e3f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#54 0xb6ab4817 in QApplication::exec () from /usr/lib/libQtGui.so.4
#55 0xb49235ad in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#56 0x0804de22 in _start ()

Reported using DrKonqi