Version:            (using Devel)
Installed from:    Compiled sources

only thing i remember is switching the desktop with a shortcut.

this doesn't look like the other crash reports relating to closeGroup - the trace ends earlier.

Application: Plasma Workspace (plasma-desktop), signal SIGSEGV
[Current thread is 0 (LWP 3473)]

Thread 2 (Thread 0x99e09b90 (LWP 3477)):
#0  0xffffe424 in __kernel_vsyscall ()
#1  0xa682afb5 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/i686/cmov/libpthread.so.0
#2  0xa6892456 in QWaitConditionPrivate::wait (this=0x8e7cdc0, time=4294967295) at /home/ossi/src/troll/qt/src/corelib/thread/qwaitcondition_unix.cpp:87
#3  0xa68920d7 in QWaitCondition::wait (this=0x8e48ef4, mutex=0x8e48ef0, time=4294967295) at /home/ossi/src/troll/qt/src/corelib/thread/qwaitcondition_unix.cpp:159
#4  0xa3883f90 in RenderThread::run (this=0x8e48ee8) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/plasma/wallpapers/image/renderthread.cpp:91
#5  0xa6891e07 in QThreadPrivate::start (arg=0x8e48ee8) at /home/ossi/src/troll/qt/src/corelib/thread/qthread_unix.cpp:189
#6  0xa68274e5 in start_thread () from /lib/i686/cmov/libpthread.so.0
#7  0xa668210e in clone () from /lib/i686/cmov/libc.so.6

Thread 1 (Thread 0xa5501700 (LWP 3473)):
[KCrash Handler]
#6  0xa39620a6 in TaskManager::AbstractGroupingStrategy::closeGroup (this=0x9185e80, group=0x8e7a818)
    at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/abstractgroupingstrategy.cpp:142
#7  0xa396c217 in TaskManager::ProgramGroupingStrategy::checkGroup (this=0x9185e80) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/strategies/programgroupingstrategy.cpp:196
#8  0xa396cb6b in TaskManager::ProgramGroupingStrategy::qt_metacall (this=0x9185e80, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xafba9edc)
    at /home/ossi/src/kde/trunk_build/KDE/kdebase/workspace/libs/taskmanager/programgroupingstrategy.moc:68
#9  0xa694ae8d in QMetaObject::activate (sender=0x8e7a818, from_signal_index=<value optimized out>, to_signal_index=22, argv=0x0) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3108
#10 0xa694b1db in QMetaObject::activate (sender=0x8e7a818, m=0xa398f194, local_signal_index=1, argv=0xafba9edc) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3185
#11 0xa397e303 in TaskManager::TaskGroup::itemRemoved (this=0x8e7a818, _t1=0x8ff34a0) at /home/ossi/src/kde/trunk_build/KDE/kdebase/workspace/libs/taskmanager/taskgroup.moc:143
#12 0xa397fa46 in TaskManager::TaskGroup::remove (this=0x8e7a818, item=0x8ff34a0) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/taskgroup.cpp:171
#13 0xa3965914 in TaskManager::GroupManagerPrivate::removeTask (this=0x8d2f218, task={d = 0xafba9fa8}) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/groupmanager.cpp:289
#14 0xa39662a9 in TaskManager::GroupManagerPrivate::reloadTasks (this=0x8d2f218) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/groupmanager.cpp:142
#15 0xa3966e37 in TaskManager::GroupManager::qt_metacall (this=0x8d9f0c0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xafbaa0dc)
    at /home/ossi/src/kde/trunk_build/KDE/kdebase/workspace/libs/taskmanager/groupmanager.moc:92
#16 0xa694ae8d in QMetaObject::activate (sender=0x8e36758, from_signal_index=<value optimized out>, to_signal_index=8, argv=0x0) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3108
#17 0xa694b1db in QMetaObject::activate (sender=0x8e36758, m=0xa398f35c, local_signal_index=4, argv=0xafbaa0dc) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3185
#18 0xa3981fa3 in TaskManager::TaskManager::desktopChanged (this=0x8e36758, _t1=3) at /home/ossi/src/kde/trunk_build/KDE/kdebase/workspace/libs/taskmanager/taskmanager.moc:180
#19 0xa3981fd4 in TaskManager::TaskManager::currentDesktopChanged (this=0x8e36758, desktop=3) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/libs/taskmanager/taskmanager.cpp:370
#20 0xa3983884 in TaskManager::TaskManager::qt_metacall (this=0x8e36758, _c=QMetaObject::InvokeMetaMethod, _id=10, _a=0xafbaa21c)
    at /home/ossi/src/kde/trunk_build/KDE/kdebase/workspace/libs/taskmanager/taskmanager.moc:111
#21 0xa694ae8d in QMetaObject::activate (sender=0x8cc4898, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x0) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3108
#22 0xa694b1db in QMetaObject::activate (sender=0x8cc4898, m=0xa78d450c, local_signal_index=0, argv=0xafbaa21c) at /home/ossi/src/troll/qt/src/corelib/kernel/qobject.cpp:3185
#23 0xa785c9b3 in KWindowSystem::currentDesktopChanged (this=0x8cc4898, _t1=3) at /home/ossi/src/kde/trunk_build/KDE/kdelibs/kdeui/kwindowsystem.moc:113
#24 0xa785f883 in KWindowSystemPrivate::x11Event (this=0x8c97970, ev=0xafbaa758) at /home/ossi/src/kde/trunk/KDE/kdelibs/kdeui/windowmanagement/kwindowsystem_x11.cpp:139
#25 0xa772b73b in KAppX11HackWidget::publicx11Event (this=0x8c97970, e=0xafbaa758) at /home/ossi/src/kde/trunk/KDE/kdelibs/kdeui/kernel/kapplication.cpp:935
#26 0xa7728552 in KApplication::x11EventFilter (this=0x8bb4288, _event=0xafbaa758) at /home/ossi/src/kde/trunk/KDE/kdelibs/kdeui/kernel/kapplication.cpp:985
#27 0xa7f5ed4f in PlasmaApp::x11EventFilter (this=0x8bb4288, event=0xafbaa758) at /home/ossi/src/kde/trunk/KDE/kdebase/workspace/plasma/shells/desktop/plasmaapp.cpp:417
#28 0xa6bd8c74 in qt_x11EventFilter (ev=0xafbaa758) at /home/ossi/src/troll/qt/src/gui/kernel/qapplication_x11.cpp:375
#29 0xa6be1d54 in QApplication::x11ProcessEvent (this=0x8bb4288, event=0xafbaa758) at /home/ossi/src/troll/qt/src/gui/kernel/qapplication_x11.cpp:3278
#30 0xa6c04139 in x11EventSourceDispatch (s=0x8bc4070, callback=0, user_data=0x0) at /home/ossi/src/troll/qt/src/gui/kernel/qguieventdispatcher_glib.cpp:146
#31 0xa58b9368 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0