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: 4.5.1
Operating System: Linux 2.6.28-13-generic x86_64
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
crashes randomly (more frequently when using vlc)

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[Current thread is 0 (LWP 3953)]

Thread 2 (Thread 0x7ff7aa3f5950 (LWP 3958)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:261
#1  0x00007ff7cce51d79 in QWaitCondition::wait (this=0x1ad04d0, mutex=0x1ad04c8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:87
#2  0x00007ff7cbcdd5dc in QHostInfoAgent::run (this=0x1ad04b0) at kernel/qhostinfo.cpp:260
#3  0x00007ff7cce50d92 in QThreadPrivate::start (arg=0x1ad04b0) at thread/qthread_unix.cpp:189
#4  0x00007ff7c8d213ba in start_thread (arg=<value optimized out>) at pthread_create.c:297
#5  0x00007ff7c9905fcd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ff7cd419750 (LWP 3953)):
[KCrash Handler]
#5  TaskManager::GroupManager::manualSortingRequest (this=0x0, taskItem=0x22a6310, newIndex=0) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:363
#6  0x00007ff7af79cb3a in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x241ee30, group=0x1d12640)
    at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/abstractgroupingstrategy.cpp:167
#7  0x00007ff7af7a3da8 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x241ee30) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#8  0x00007ff7af7a4c2d in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x241ee30, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/programgroupingstrategy.moc:68
#9  0x00007ff7ccf4f962 in QMetaObject::activate (sender=0x1d12640, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3120
#10 0x00007ff7af7b5a92 in TaskManager::TaskGroup::itemRemoved (this=0x0, _t1=0x2442800) at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskgroup.moc:146
#11 0x00007ff7af7b63b1 in TaskManager::TaskGroup::remove (this=0x1d12640, item=0x2442800) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskgroup.cpp:182
#12 0x00007ff7af79eed1 in TaskManager::GroupManagerPrivate::removeTask (this=0x1403890, task={d = 0x7fffd544bbf0}) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:311
#13 0x00007ff7af7a151d in TaskManager::GroupManager::qt_metacall (this=0x13f4290, _c=<value optimized out>, _id=<value optimized out>, _a=0x7fffd544bd30)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/groupmanager.moc:105
#14 0x00007ff7ccf4f962 in QMetaObject::activate (sender=0x13f43c0, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3120
#15 0x00007ff7af7b8f35 in TaskManager::TaskManager::taskRemoved (this=0x0, _t1=<value optimized out>)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskmanager.moc:162
#16 0x00007ff7af7ba56e in TaskManager::TaskManager::windowRemoved (this=0x13f43c0, w=50343525) at /build/buildd/kdebase-workspace-4.2.95/libs/taskmanager/taskmanager.cpp:279
#17 0x00007ff7af7bc2bf in TaskManager::TaskManager::qt_metacall (this=0x13f43c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffd544bf50)
    at /build/buildd/kdebase-workspace-4.2.95/obj-x86_64-linux-gnu/libs/taskmanager/taskmanager.moc:110
#18 0x00007ff7ccf4f962 in QMetaObject::activate (sender=0x11e5730, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3120
#19 0x00007ff7cb746ab2 in KWindowSystem::windowRemoved (this=0x0, _t1=50343525) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#20 0x00007ff7cb748ffb in KWindowSystemPrivate::removeClient (this=0x11e59c0, w=50343525) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#21 0x00007ff7cb757fe1 in NETRootInfo::update (this=0x11e59e8, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2135
#22 0x00007ff7cb75836b in NETRootInfo::event (this=0x11e59e8, event=<value optimized out>, properties=0x7fffd544c240, properties_size=5)
    at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#23 0x00007ff7cb7492cb in KWindowSystemPrivate::x11Event (this=0x11e59c0, ev=0x7fffd544dc70) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#24 0x00007ff7cb618a43 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fffd544dc70) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:911
#25 0x00007ff7c0d8eb57 in PlasmaApp::x11EventFilter (this=0xe973a0, event=0x7fffd544dc70) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/plasmaapp.cpp:490
#26 0x00007ff7ca538fdf in qt_x11EventFilter (ev=0x7fffd544dc70) at kernel/qapplication_x11.cpp:375
#27 0x00007ff7ca54c4e4 in QApplication::x11ProcessEvent (this=0xe973a0, event=0x7fffd544dc70) at kernel/qapplication_x11.cpp:3287
#28 0x00007ff7ca575f84 in x11EventSourceDispatch (s=0xedc420, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0x00007ff7c8f7020a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0x00007ff7c8f738e0 in ?? () from /usr/lib/libglib-2.0.so.0
#31 0x00007ff7c8f73a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0x00007ff7ccf635bf in QEventDispatcherGlib::processEvents (this=0xed7a10, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#33 0x00007ff7ca57570f in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007ff7ccf38732 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -716906656}) at kernel/qeventloop.cpp:149
#35 0x00007ff7ccf38afd in QEventLoop::exec (this=0x7fffd544dfa0, flags={i = -716906576}) at kernel/qeventloop.cpp:200
#36 0x00007ff7ccf3adc4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x00007ff7c0d7b63b in kdemain (argc=1, argv=0xe7c8b0) at /build/buildd/kdebase-workspace-4.2.95/plasma/shells/desktop/main.cpp:50
#38 0x000000000040714e in launch (argc=1, _name=0xe8c878 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0xe8c898 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x40a309 "0") at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:672
#39 0x0000000000407978 in handle_launcher_request (sock=7, who=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1164
#40 0x0000000000407f25 in handle_requests (waitForPid=0) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1357
#41 0x0000000000408a66 in main (argc=2, argv=0x7fffd544ee38, envp=0x7fffd544ee50) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1784

Reported using DrKonqi