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 2.6.29.3-desktop-1mnb i686
Distribution: "Mandriva Linux 2009.1"

What I was doing when the application crashed:
During startup, few windows appear ( akonadi errors), close one of them and Plasma crashed. 

 -- Backtrace:
Application: Espace de travail Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0xb5f63a80 (LWP 6033))]

Thread 2 (Thread 0xa80e4b70 (LWP 6036)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xb7df7ad5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/libpthread.so.0
#2  0xb7e53280 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#3  0xb6598d5c in ?? () from /usr/lib/libQtNetwork.so.4
#4  0xb7e52143 in ?? () from /usr/lib/libQtCore.so.4
#5  0xb7df38e5 in start_thread () from /lib/i686/libpthread.so.0
#6  0xb6844bbe in clone () from /lib/i686/libc.so.6

Thread 1 (Thread 0xb5f63a80 (LWP 6033)):
[KCrash Handler]
#6  TaskManager::GroupManager::manualSortingRequest (this=0x0, taskItem=0x9662bf8, newIndex=0) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:363
#7  0xa81f63e8 in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x97c5050, group=0x9dcced0) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/abstractgroupingstrategy.cpp:167
#8  0xa8200d85 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x97c5050) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/strategies/programgroupingstrategy.cpp:204
#9  0xa8201793 in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x97c5050, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfd75588)
    at /usr/src/debug/kdebase-workspace-4.2.95/build/libs/taskmanager/programgroupingstrategy.moc:68
#10 0xb7f61f29 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#11 0xb7f62c65 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0xa8214475 in TaskManager::TaskGroup::itemRemoved (this=0x9dcced0, _t1=0x9d84be0) at /usr/src/debug/kdebase-workspace-4.2.95/build/libs/taskmanager/taskgroup.moc:146
#13 0xa8215d2b in TaskManager::TaskGroup::remove (this=0x9dcced0, item=0x9d84be0) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/taskgroup.cpp:182
#14 0xa81f9c46 in TaskManager::GroupManagerPrivate::removeTask (this=0x97c22a0, task={d = 0x9d85f30}) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/groupmanager.cpp:311
#15 0xa81fafa6 in TaskManager::GroupManager::qt_metacall (this=0x97cd678, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbfd75748)
    at /usr/src/debug/kdebase-workspace-4.2.95/build/libs/taskmanager/groupmanager.moc:105
#16 0xb7f61f29 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#17 0xb7f62c65 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#18 0xa8218555 in TaskManager::TaskManager::taskRemoved (this=0x97cc198, _t1={d = 0x9d85f30}) at /usr/src/debug/kdebase-workspace-4.2.95/build/libs/taskmanager/taskmanager.moc:162
#19 0xa8219399 in TaskManager::TaskManager::windowRemoved (this=0x97cc198, w=56623135) at /usr/src/debug/kdebase-workspace-4.2.95/libs/taskmanager/taskmanager.cpp:278
#20 0xa8219f45 in TaskManager::TaskManager::qt_metacall (this=0x97cc198, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbfd758d8)
    at /usr/src/debug/kdebase-workspace-4.2.95/build/libs/taskmanager/taskmanager.moc:110
#21 0xb7f61f29 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb7f62c65 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb765f0b5 in KWindowSystem::windowRemoved (this=0x95552d8, _t1=56623135) at /usr/src/debug/kdelibs-4.2.95/build/kdeui/kwindowsystem.moc:127
#24 0xb7661bd8 in KWindowSystemPrivate::removeClient (this=0x93557d8, w=56623135) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:249
#25 0xb766f2be in NETRootInfo::update (this=0x93557ec, dirty_props=0xbfd75a48) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/netwm.cpp:2135
#26 0xb7670500 in NETRootInfo::event (this=0x93557ec, event=<value optimized out>, properties=0xbfd75b30, properties_size=5) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/netwm.cpp:2058
#27 0xb7661cb7 in KWindowSystemPrivate::x11Event (this=0x93557d8, ev=0xbfd7718c) at /usr/src/debug/kdelibs-4.2.95/kdeui/windowmanagement/kwindowsystem_x11.cpp:136
#28 0xb7526e7a in KAppX11HackWidget::publicx11Event (this=0x93557d8, e=0xbfd7718c) at /usr/src/debug/kdelibs-4.2.95/kdeui/kernel/kapplication.cpp:900
#29 0xb7523c6a in KApplication::x11EventFilter (this=0x926f640, _event=0xbfd7718c) at /usr/src/debug/kdelibs-4.2.95/kdeui/kernel/kapplication.cpp:950
#30 0xb3a876bc in PlasmaApp::x11EventFilter (this=0x926f640, event=0xbfd7718c) at /usr/src/debug/kdebase-workspace-4.2.95/plasma/shells/desktop/plasmaapp.cpp:490
#31 0xb6b34041 in ?? () from /usr/lib/libQtGui.so.4
#32 0xb6b45bcd in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#33 0xb6b727c8 in ?? () from /usr/lib/libQtGui.so.4
#34 0xb66bae32 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#35 0xb66be4a8 in ?? () from /usr/lib/libglib-2.0.so.0
#36 0xb66be5ce in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#37 0xb7f779d8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#38 0xb6b71efa in ?? () from /usr/lib/libQtGui.so.4
#39 0xb7f49d8d in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#40 0xb7f4a1d9 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#41 0xb7f4c6c0 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#42 0xb6acef44 in QApplication::exec () from /usr/lib/libQtGui.so.4
#43 0xb3a6f4ce in kdemain (argc=1, argv=0x9269d68) at /usr/src/debug/kdebase-workspace-4.2.95/plasma/shells/desktop/main.cpp:50
#44 0x0804db4a in launch (argc=<value optimized out>, _name=<value optimized out>, args=<value optimized out>, cwd=0x0, envc=0, envs=0x9266a98 "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x8051ba8 "0") at /usr/src/debug/kdelibs-4.2.95/kinit/kinit.cpp:672
#45 0x0804e2a5 in handle_launcher_request (sock=7, who=<value optimized out>) at /usr/src/debug/kdelibs-4.2.95/kinit/kinit.cpp:1164
#46 0x0804f014 in handle_requests (waitForPid=<value optimized out>) at /usr/src/debug/kdelibs-4.2.95/kinit/kinit.cpp:1357
#47 0x0804f8a5 in main (argc=2, argv=0xbfd77b64, envp=0xbfd77b70) at /usr/src/debug/kdelibs-4.2.95/kinit/kinit.cpp:1784

This bug may be a duplicate of or related to bug 194457

Reported using DrKonqi