Application: plasma-desktop (0.4)
KDE Platform Version: 4.6.00 (4.6.0) "release 6"
Qt Version: 4.7.1
Operating System: Linux 2.6.37.6-0.9-desktop x86_64
Distribution: "openSUSE 11.4 (x86_64)"

-- Information about the crash:
Was just changing desktops. TheAdd-on for thunderbird - firetray, appeared in the upper left corner as a small window. The taskbar was missing and likely in the upper left corner as a small window. Wallpaper was missing- appeared black. KDE crash handler appeared- can continue as normal, but error occurs more frequently as you go on. System was running for a short time (<4 hours) since last shutdown/reboot. OpenSuse 11.4

-- Backtrace:
Application: Plasma Desktop Shell (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fcceb022760 (LWP 4123))]

Thread 2 (Thread 0x7fccca770700 (LWP 4188)):
#0  0x00007fcce87214f3 in poll () from /lib64/libc.so.6
#1  0x00007fcce5592114 in ?? () from /lib64/libglib-2.0.so.0
#2  0x00007fcce5592650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007fcce9d12956 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#4  0x00007fcce9ce7032 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#5  0x00007fcce9ce7245 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#6  0x00007fcce9bfc1e4 in QThread::exec() () from /usr/lib64/libQtCore.so.4
#7  0x00007fcce9cc8948 in ?? () from /usr/lib64/libQtCore.so.4
#8  0x00007fcce9bfea5e in ?? () from /usr/lib64/libQtCore.so.4
#9  0x00007fcce996fa3f in start_thread () from /lib64/libpthread.so.0
#10 0x00007fcce872a66d in clone () from /lib64/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fcceb022760 (LWP 4123)):
[KCrash Handler]
#6  0x00007fccd228a0bb in TaskItemLayout::preferredColumns (this=0xa28400) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskitemlayout.cpp:247
#7  0x00007fccd228a21d in TaskItemLayout::gridLayoutSize (this=0xa28400) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskitemlayout.cpp:265
#8  0x00007fccd228a2ad in TaskItemLayout::layoutItems (this=0xa28400) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskitemlayout.cpp:288
#9  0x00007fccd228aaf8 in TaskItemLayout::remove (this=0xa28400, item=0x1365930) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskitemlayout.cpp:163
#10 0x00007fccd228ac1e in TaskItemLayout::removeTaskItem (this=0xa28400, item=0x1365930) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskitemlayout.cpp:113
#11 0x00007fccd229402b in TaskGroupItem::itemRemoved (this=0xa23c00, groupableItem=0x893700) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskgroupitem.cpp:555
#12 0x00007fccd2297859 in TaskGroupItem::reload (this=0xa23c00) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskgroupitem.cpp:344
#13 0x00007fccd2297b77 in TaskGroupItem::setGroup (this=0xa23c00, group=0x128b240) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/applets/tasks/taskgroupitem.cpp:379
#14 0x00007fccd22874ec in Tasks::qt_metacall (this=0x85ce70, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff580afa20) at /usr/src/debug/kdebase-workspace-4.6.0/build/plasma/desktop/applets/tasks/tasks.moc:99
#15 0x00007fcce9cfcdcf in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#16 0x00007fccd24c2243 in TaskManager::GroupManagerPrivate::actuallyReloadTasks (this=0xb23a80) at /usr/src/debug/kdebase-workspace-4.6.0/libs/taskmanager/groupmanager.cpp:191
#17 0x00007fccd24c36f1 in TaskManager::GroupManager::qt_metacall (this=0xb1e610, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0x7fff580afc10) at /usr/src/debug/kdebase-workspace-4.6.0/build/libs/taskmanager/groupmanager.moc:117
#18 0x00007fcce9cfcdcf in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#19 0x00007fcce9cfb779 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#20 0x00007fcce8e96d14 in QApplicationPrivate::notify_helper (this=0x6a5b40, receiver=0xb23ad8, e=0x7fff580b03b0) at kernel/qapplication.cpp:4445
#21 0x00007fcce8e9f22a in QApplication::notify (this=<value optimized out>, receiver=0xb23ad8, e=0x7fff580b03b0) at kernel/qapplication.cpp:4324
#22 0x00007fccea98b9e6 in KApplication::notify (this=0x69b6d0, receiver=0xb23ad8, event=0x7fff580b03b0) at /usr/src/debug/kdelibs-4.6.0/kdeui/kernel/kapplication.cpp:311
#23 0x00007fcce9ce7bdc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#24 0x00007fcce9d154b8 in ?? () from /usr/lib64/libQtCore.so.4
#25 0x00007fcce9d12224 in ?? () from /usr/lib64/libQtCore.so.4
#26 0x00007fcce5591bd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#27 0x00007fcce55923b0 in ?? () from /lib64/libglib-2.0.so.0
#28 0x00007fcce5592650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#29 0x00007fcce9d128ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#30 0x00007fcce8f3bd8e in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#31 0x00007fcce9ce7032 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#32 0x00007fcce9ce7245 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#33 0x00007fcce9ceb68b in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#34 0x00007fccda919da8 in kdemain (argc=1, argv=0x67b800) at /usr/src/debug/kdebase-workspace-4.6.0/plasma/desktop/shell/main.cpp:118
#35 0x00000000004075e9 in _start ()

Possible duplicates by query: bug 282190, bug 277114, bug 276595, bug 268295, bug 266400.

Reported using DrKonqi