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

 -- Backtrace:
Application: Plasma Workspace (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#5  0x00007fadb12f4766 in TaskManager::GroupManager::manualSortingRequest () from /usr/lib/libtaskmanager.so.4
#6  0x00007fadb12f2b3a in TaskManager::AbstractGroupingStrategy::closeGroup () from /usr/lib/libtaskmanager.so.4
#7  0x00007fadb12f9da8 in ?? () from /usr/lib/libtaskmanager.so.4
#8  0x00007fadb12fac2d in ?? () from /usr/lib/libtaskmanager.so.4
#9  0x00007fadce8f68d2 in QMetaObject::activate (sender=0x1956ff0, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x1) at kernel/qobject.cpp:3120
#10 0x00007fadb130ba92 in TaskManager::TaskGroup::itemRemoved () from /usr/lib/libtaskmanager.so.4
#11 0x00007fadb130c3b1 in TaskManager::TaskGroup::remove () from /usr/lib/libtaskmanager.so.4
#12 0x00007fadb12f4ed1 in ?? () from /usr/lib/libtaskmanager.so.4
#13 0x00007fadb12f751d in TaskManager::GroupManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#14 0x00007fadce8f68d2 in QMetaObject::activate (sender=0x1de2480, from_signal_index=<value optimized out>, to_signal_index=5, argv=0x1) at kernel/qobject.cpp:3120
#15 0x00007fadb130ef35 in TaskManager::TaskManager::taskRemoved () from /usr/lib/libtaskmanager.so.4
#16 0x00007fadb131056e in TaskManager::TaskManager::windowRemoved () from /usr/lib/libtaskmanager.so.4
#17 0x00007fadb13122bf in TaskManager::TaskManager::qt_metacall () from /usr/lib/libtaskmanager.so.4
#18 0x00007fadce8f68d2 in QMetaObject::activate (sender=0x1c783a0, from_signal_index=<value optimized out>, to_signal_index=6, argv=0x1) at kernel/qobject.cpp:3120
#19 0x00007fadcd0edab2 in KWindowSystem::windowRemoved (this=0x0, _t1=56693086) at /build/buildd/kde4libs-4.2.95/obj-x86_64-linux-gnu/kdeui/kwindowsystem.moc:127
#20 0x00007fadcd0efffb in KWindowSystemPrivate::removeClient (this=0x1c025a0, w=56693086) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#21 0x00007fadcd0ff030 in NETRootInfo::update (this=0x1c025c8, dirty_props=<value optimized out>) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2131
#22 0x00007fadcd0ff36b in NETRootInfo::event (this=0x1c025c8, event=<value optimized out>, properties=0x7fffd6df1c70, properties_size=5)
    at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#23 0x00007fadcd0f02cb in KWindowSystemPrivate::x11Event (this=0x1c025a0, ev=0x7fffd6df36a0) at /build/buildd/kde4libs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#24 0x00007fadccfbfa43 in KApplication::x11EventFilter (this=<value optimized out>, _event=0x7fffd6df36a0) at /build/buildd/kde4libs-4.2.95/kdeui/kernel/kapplication.cpp:911
#25 0x00007fadc281fb57 in ?? () from /usr/lib/libkdeinit4_plasma-desktop.so
#26 0x00007fadcbedffdf in qt_x11EventFilter (ev=0x7fffd6df36a0) at kernel/qapplication_x11.cpp:375
#27 0x00007fadcbef34e4 in QApplication::x11ProcessEvent (this=0x1893e60, event=0x7fffd6df36a0) at kernel/qapplication_x11.cpp:3287
#28 0x00007fadcbf1cf84 in x11EventSourceDispatch (s=0x18d69e0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#29 0x00007fadca91720a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#30 0x00007fadca91a8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#31 0x00007fadca91aa7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#32 0x00007fadce90a52f in QEventDispatcherGlib::processEvents (this=0x18d2ec0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#33 0x00007fadcbf1c70f in QGuiEventDispatcherGlib::processEvents (this=0x0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#34 0x00007fadce8df6a2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = -690013808}) at kernel/qeventloop.cpp:149
#35 0x00007fadce8dfa6d in QEventLoop::exec (this=0x7fffd6df39d0, flags={i = -690013728}) at kernel/qeventloop.cpp:200
#36 0x00007fadce8e1d34 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#37 0x00007fadc280c63b in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#38 0x000000000040714e in launch (argc=1, _name=0x1886948 "/usr/bin/plasma-desktop", args=<value optimized out>, cwd=0x0, envc=0, envs=0x1886968 "", 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=0x7fffd6df4868, envp=0x7fffd6df4880) at /build/buildd/kde4libs-4.2.95/kinit/kinit.cpp:1784

Reported using DrKonqi