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 2.6.30.5_nogrsecuritynoaapae-0.3 i686

What I was doing when the application crashed:
I've switched between desktops using keyboard shortcut

 -- Backtrace:
Application: Przestrzeń robocza Plazmy (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  Tasks::itemTopMargin (this=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/tasks.h:92
#7  AbstractTaskItem::basicPreferredSize (this=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/abstracttaskitem.cpp:99
#8  0xa84d2e39 in TaskItemLayout::preferredColumns (this=0x87835b0) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:206
#9  0xa84d3ac0 in TaskItemLayout::gridLayoutSize (this=0x87835b0) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:222
#10 0xa84d3b78 in TaskItemLayout::layoutItems (this=0x87835b0) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:245
#11 0xa84d4587 in TaskItemLayout::insert (this=0x87835b0, index=6, item=0x8f52490) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:125
#12 0xa84d4757 in TaskItemLayout::addTaskItem (this=0x87835b0, item=0x8f52490) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskitemlayout.cpp:82
#13 0xa84e00af in TaskGroupItem::itemAdded (this=0x886b020, groupableItem=0x9027800) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/applets/tasks/taskgroupitem.cpp:477
#14 0xa84e0f30 in TaskGroupItem::qt_metacall (this=0x886b020, _c=QMetaObject::InvokeMetaMethod, _id=29, _a=0xbf923058)
    at /usr/src/debug/kdebase-workspace-4.3.0/build/plasma/applets/tasks/taskgroupitem.moc:113
#15 0xb7e5fe1e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#16 0xb7e60a0e in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#17 0xa84a76f9 in TaskManager::TaskGroup::itemAdded (this=0x8862f30, _t1=0x9027800) at /usr/src/debug/kdebase-workspace-4.3.0/build/libs/taskmanager/taskgroup.moc:139
#18 0xa84a8095 in TaskManager::TaskGroup::add (this=0x8862f30, item=0x9027800) at /usr/src/debug/kdebase-workspace-4.3.0/libs/taskmanager/taskgroup.cpp:138
#19 0xa8496760 in TaskManager::ProgramGroupingStrategy::handleItem (this=0x8e59920, item=0x9027800)
    at /usr/src/debug/kdebase-workspace-4.3.0/libs/taskmanager/strategies/programgroupingstrategy.cpp:154
#20 0xa8490762 in TaskManager::GroupManagerPrivate::addTask (this=0x8863530, task=) at /usr/src/debug/kdebase-workspace-4.3.0/libs/taskmanager/groupmanager.cpp:288
#21 0xa8491109 in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0x8863530) at /usr/src/debug/kdebase-workspace-4.3.0/libs/taskmanager/groupmanager.cpp:155
#22 0xa8492923 in TaskManager::GroupManager::qt_metacall (this=0x88653d8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbf9232bc)
    at /usr/src/debug/kdebase-workspace-4.3.0/build/libs/taskmanager/groupmanager.moc:108
#23 0xb7e5fe1e in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/libQtCore.so.4
#24 0xb7e60a0e in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/libQtCore.so.4
#25 0xb7e9794d in QTimer::timeout() () from /usr/lib/libQtCore.so.4
#26 0xb7e64e3c in QTimer::timerEvent(QTimerEvent*) () from /usr/lib/libQtCore.so.4
#27 0xb7e5a3e9 in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#28 0xb6ae73cf in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#29 0xb6aee3d0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#30 0xb74bb570 in KApplication::notify (this=0x8171a70, receiver=0x8863570, event=0xbf9236b0) at /usr/src/debug/kdelibs-4.3.0/kdeui/kernel/kapplication.cpp:302
#31 0xb7e4b7fe in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#32 0xb7e7645b in ?? () from /usr/lib/libQtCore.so.4
#33 0xb7e73fb7 in ?? () from /usr/lib/libQtCore.so.4
#34 0xb66f6963 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0xb66f9bda in ?? () from /usr/lib/libglib-2.0.so.0
#36 0xb66f9cf2 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0xb7e73f1a in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#38 0xb6b7cd57 in ?? () from /usr/lib/libQtGui.so.4
#39 0xb7e4a075 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#40 0xb7e4a468 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#41 0xb7e4c570 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#42 0xb6ae7287 in QApplication::exec() () from /usr/lib/libQtGui.so.4
#43 0xb3adb5bc in kdemain (argc=1, argv=0x81454c0) at /usr/src/debug/kdebase-workspace-4.3.0/plasma/shells/desktop/main.cpp:50
#44 0x0804d84b in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x810f0c0 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8050847 "0") at /usr/src/debug/kdelibs-4.3.0/kinit/kinit.cpp:676
#45 0x0804e3b8 in handle_launcher_request (sock=<value optimized out>, who=<value optimized out>) at /usr/src/debug/kdelibs-4.3.0/kinit/kinit.cpp:1168
#46 0x0804e84c in handle_requests (waitForPid=<value optimized out>) at /usr/src/debug/kdelibs-4.3.0/kinit/kinit.cpp:1361
#47 0x0804f053 in main (argc=2, argv=0xbf924234, envp=0xbf924240) at /usr/src/debug/kdelibs-4.3.0/kinit/kinit.cpp:1788

This bug may be a duplicate of or related to bug 203840

Reported using DrKonqi