Application that crashed: plasma-desktop
Version of the application: 0.3
KDE Version: 4.2.95 (KDE 4.2.95 (KDE 4.3 RC1))
Qt Version: 4.5.2
Operating System: Linux 2.6.29.5-191.fc11.x86_64 x86_64

What I was doing when the application crashed:
This is using kdelibs-4.2.95-3.fc11.x86_64 on Fedora, which -- if I understand correctly -- should already have the patch from bug 198338 applied, so this seems to be some other issue.

 -- Backtrace:
Application: Plasma Workspace (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fe7fb4a3820 (LWP 2228))]

Thread 2 (Thread 0x7fe7e5674910 (LWP 2229)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x000000352e25ad7b in QWaitConditionPrivate::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:87
#2  QWaitCondition::wait (time=<value optimized out>, this=<value optimized out>) at thread/qwaitcondition_unix.cpp:159
#3  0x00000036f2a81dac in QHostInfoAgent::run (this=0x2b07e10) at kernel/qhostinfo.cpp:260
#4  0x000000352e259cd5 in QThreadPrivate::start (arg=0x2b07e10) at thread/qthread_unix.cpp:188
#5  0x0000003f0fc0686a in start_thread (arg=<value optimized out>) at pthread_create.c:297
#6  0x0000003f0f0de25d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fe7fb4a3820 (LWP 2228)):
[KCrash Handler]
#5  TaskManager::GroupManager::manualSortingRequest (this=0x0, taskItem=0x2ba1500, newIndex=0) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:363
#6  0x00000036f8e185e7 in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x2b27e10, group=0x30a39c0)
    at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/abstractgroupingstrategy.cpp:167
#7  0x00000036f8e1f4ab in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x2b27e10) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#8  0x00000036f8e200b5 in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x2b27e10, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=<value optimized out>)
    at /usr/src/debug/kdebase-workspace-4.2.95/x86_64-redhat-linux-gnu/libs/taskmanager/programgroupingstrategy.moc:68
#9  0x000000352e354fdc in QMetaObject::activate (sender=0x30a39c0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#10 0x00000036f8e30c82 in TaskManager::TaskGroup::itemRemoved (this=0x0, _t1=0x2e8dff0) at /usr/src/debug/kdebase-workspace-4.2.95/x86_64-redhat-linux-gnu/libs/taskmanager/taskgroup.moc:146
#11 0x00000036f8e31351 in TaskManager::TaskGroup::remove (this=0x30a39c0, item=0x2e8dff0) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/taskgroup.cpp:182
#12 0x00000036f8e1abb8 in TaskManager::GroupManagerPrivate::removeTask (this=0x2b27b10, task={d = 0x308ce40}) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:311
#13 0x00000036f8e1cf9a in TaskManager::GroupManager::qt_metacall (this=0x282c860, _c=<value optimized out>, _id=<value optimized out>, _a=0x7fffca93a1b0)
    at /usr/src/debug/kdebase-workspace-4.2.95/x86_64-redhat-linux-gnu/libs/taskmanager/groupmanager.moc:105
#14 0x000000352e354fdc in QMetaObject::activate (sender=0x2b2c380, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#15 0x00000036f8e340b5 in TaskManager::TaskManager::taskRemoved (this=0x0, _t1=<value optimized out>)
    at /usr/src/debug/kdebase-workspace-4.2.95/x86_64-redhat-linux-gnu/libs/taskmanager/taskmanager.moc:162
#16 0x00000036f8e35c58 in TaskManager::TaskManager::windowRemoved (this=0x2b2c380, w=39848929) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/taskmanager.cpp:278
#17 0x00000036f8e373e7 in TaskManager::TaskManager::qt_metacall (this=0x2b2c380, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffca93a3e0)
    at /usr/src/debug/kdebase-workspace-4.2.95/x86_64-redhat-linux-gnu/libs/taskmanager/taskmanager.moc:110
#18 0x000000352e354fdc in QMetaObject::activate (sender=0x256c9f0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#19 0x00000036f533bae2 in KWindowSystem::windowRemoved (this=0x0, _t1=39848929) at /usr/src/debug/kdelibs-4.2.95/x86_64-redhat-linux-gnu/kdeui/kwindowsystem.moc:127
#20 0x00000036f533e8da in KWindowSystemPrivate::removeClient (this=0x24dab90, w=39848929) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#21 0x00000036f534cc0d in NETRootInfo::update (this=0x24dabb8, dirty_props=<value optimized out>) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/netwm.cpp:2135
#22 0x00000036f534cf73 in NETRootInfo::event (this=0x24dabb8, event=<value optimized out>, properties=0x7fffca93a6d0, properties_size=5)
    at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#23 0x00000036f533eb8c in KWindowSystemPrivate::x11Event (this=0x24dab90, ev=0x7fffca93c0a0) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#24 0x00000036f520f8a6 in KAppX11HackWidget::publicx11Event (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.2.95/kdeui/kernel/kapplication.cpp:900
#25 KApplication::x11EventFilter (e=<value optimized out>, this=<value optimized out>) at /usr/src/debug/kdelibs-4.2.95/kdeui/kernel/kapplication.cpp:950
#26 0x00000036f584de47 in PlasmaApp::x11EventFilter (this=0x2266920, event=0x7fffca93c0a0) at /usr/src/debug/kdebase-workspace-4.2.95/plasma/shells/desktop/plasmaapp.cpp:490
#27 0x00000036f33e9231 in qt_x11EventFilter (ev=0x7fffca93c0a0) at kernel/qapplication_x11.cpp:375
#28 0x00000036f33f9634 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffca93c0a0) at kernel/qapplication_x11.cpp:3271
#29 0x00000036f34223bc in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#30 0x000000352d237abe in g_main_dispatch (context=<value optimized out>) at gmain.c:1824
#31 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2377
#32 0x000000352d23b278 in g_main_context_iterate (context=0x2284920, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2455
#33 0x000000352d23b3a0 in IA__g_main_context_iteration (context=0x2284920, may_block=1) at gmain.c:2518
#34 0x000000352e3683b6 in QEventDispatcherGlib::processEvents (this=0x224e640, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#35 0x00000036f3421b6e in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#36 0x000000352e33e5f2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 36}) at kernel/qeventloop.cpp:149
#37 0x000000352e33e9c4 in QEventLoop::exec (this=0x7fffca93c3d0, flags={i = 0}) at kernel/qeventloop.cpp:201
#38 0x000000352e340b79 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#39 0x00000036f583ac6f in kdemain (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdebase-workspace-4.2.95/plasma/shells/desktop/main.cpp:50
#40 0x0000003f0f01ea2d in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fffca93c6d8) at libc-start.c:220
#41 0x0000000000400779 in _start ()

Reported using DrKonqi