Version:           unspecified (using KDE 4.7.3) 
OS:                Linux

starting kdiff3 (Alt + F2) or eclipse from konsole:

Application 'plasma-desktop' crashing... (.xsession-errors)
Dark screen -> plasma restart

see also Bug 286185 with same behaviour

KDE 4.7.2 was very stable, plasma crashing... never happened !

Reproducible: Sometimes

Steps to Reproduce:
> eclipse &

Actual Results:  
Application 'plasma-desktop' crashing...

Application: Plasma-Desktop-Umgebung (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7fdec1697760 (LWP 9334))]

Thread 2 (Thread 0x7fde9c9d9700 (LWP 9335)):
#0  0x00007fdebed1e4f3 in poll () from /lib64/libc.so.6
#1  0x00007fdebbb4c114 in ?? () from /lib64/libglib-2.0.so.0
#2  0x00007fdebbb4c650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#3  0x00007fdec031c636 in QEventDispatcherGlib::processEvents (this=0x10de140, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#4  0x00007fdec02f0c22 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fdec02f0e35 in QEventLoop::exec (this=0x7fde9c9d8d20, flags=...) at kernel/qeventloop.cpp:201
#6  0x00007fdec0205be4 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:498
#7  0x00007fdec02d2358 in QInotifyFileSystemWatcherEngine::run (this=0x10d0010) at io/qfilesystemwatcher_inotify.cpp:248
#8  0x00007fdec02084d5 in QThreadPrivate::start (arg=0x10d0010) at thread/qthread_unix.cpp:331
#9  0x00007fdeb15bd9e3 in ?? () from /usr/X11R6/lib64/libGL.so.1
#10 0x00007fdebff77a3f in start_thread () from /lib64/libpthread.so.0
#11 0x00007fdebed2766d in clone () from /lib64/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7fdec1697760 (LWP 9334)):
[KCrash Handler]
#6  operator== (this=0x1ee2690) at /usr/include/QtCore/qbasicatomic.h:70
#7  isNull (this=0x1ee2690) at /usr/include/QtCore/qsharedpointer_impl.h:568
#8  operator! (this=0x1ee2690) at /usr/include/QtCore/qsharedpointer_impl.h:574
#9  TaskManager::TaskItem::task (this=0x1ee2690) at /usr/src/debug/kde-workspace-4.7.3/libs/taskmanager/taskitem.cpp:113
#10 0x00007fdea6d281ea in WindowTaskItem::publishIconGeometry (this=0x1ebfd20, rect=...) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/windowtaskitem.cpp:130
#11 0x00007fdea6d391ca in TaskGroupItem::publishIconGeometry (this=<value optimized out>, rect=...) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/taskgroupitem.cpp:1432
#12 0x00007fdea6d37c75 in TaskGroupItem::publishIconGeometry (this=0x1ebf0f0) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/taskgroupitem.cpp:1424
#13 0x00007fdea6d355ec in AbstractTaskItem::timerEvent (this=0x1ebf0f0, event=<value optimized out>) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/applets/tasks/abstracttaskitem.cpp:439
#14 0x00007fdec03054d9 in QObject::event (this=0x1ebf0f0, e=<value optimized out>) at kernel/qobject.cpp:1190
#15 0x00007fdebfab687b in QGraphicsWidget::event (this=0x1ebf0f0, event=0x7ffff037d090) at graphicsview/qgraphicswidget.cpp:1455
#16 0x00007fdebf497264 in QApplicationPrivate::notify_helper (this=0x71cb70, receiver=0x1ebf0f0, e=0x7ffff037d090) at kernel/qapplication.cpp:4481
#17 0x00007fdebf49f81a in QApplication::notify (this=<value optimized out>, receiver=0x1ebf0f0, e=0x7ffff037d090) at kernel/qapplication.cpp:4360
#18 0x00007fdec107cae6 in KApplication::notify (this=0x6ffae0, receiver=0x1ebf0f0, event=0x7ffff037d090) at /usr/src/debug/kdelibs-4.7.3/kdeui/kernel/kapplication.cpp:311
#19 0x00007fdec02f17cc in QCoreApplication::notifyInternal (this=0x6ffae0, receiver=0x1ebf0f0, event=0x7ffff037d090) at kernel/qcoreapplication.cpp:787
#20 0x00007fdec031f198 in sendEvent (this=0x719470) at kernel/qcoreapplication.h:215
#21 QTimerInfoList::activateTimers (this=0x719470) at kernel/qeventdispatcher_unix.cpp:618
#22 0x00007fdec031bf28 in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:184
#23 idleTimerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:231
#24 0x00007fdebbb4bbd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#25 0x00007fdebbb4c3b0 in ?? () from /lib64/libglib-2.0.so.0
#26 0x00007fdebbb4c650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#27 0x00007fdec031c5df in QEventDispatcherGlib::processEvents (this=0x714810, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:422
#28 0x00007fdebf53d1ae in QGuiEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#29 0x00007fdec02f0c22 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#30 0x00007fdec02f0e35 in QEventLoop::exec (this=0x7ffff037d3a0, flags=...) at kernel/qeventloop.cpp:201
#31 0x00007fdec02f527b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1064
#32 0x00007fdead82925d in kdemain (argc=1, argv=0x6b5600) at /usr/src/debug/kde-workspace-4.7.3/plasma/desktop/shell/main.cpp:120
#33 0x0000000000407279 in _start ()

Expected Results:  
No crashing... when starting eclipse or kdiff3 as in KDE 4.7.2.

http://download.opensuse.org/repositories/KDE:/Release:/47/openSUSE_11.4/