Version:           unspecified (using KDE 4.6.0) 
OS:                Linux

Hello, 2 days ago, the knetworkmanager icon has disappeared from the task bar and I have to restore it to connect to a net.

Reproducible: Sometimes

Steps to Reproduce:
When I try to restore it, through "Add graphic elements", and I try to connect to the net, no problem. After, I drag this icon to the task bar,

Actual Results:  
There are errors and the desktop restarts. The knetworkmanager icon doesn't indicate if the computer is connected to the net or not, despite I am connected.

Expected Results:  
The knetworkmanager icon should indicate if the computer is connected to the net or not. 

I send the following report:

Application: Shell de escritorio Plasma (kdeinit4), signal: Segmentation fault
[Current thread is 1 (Thread 0x7f6591225760 (LWP 1700))]

Thread 2 (Thread 0x7f656db4a700 (LWP 1707)):
#0  0xffffffffff600177 in ?? ()
#1  0x00007fff041ac7a1 in ?? ()
#2  0x00007f658ba462b3 in clock_gettime () from /lib64/librt.so.1
#3  0x00007f658fe542b2 in ?? () from /usr/lib64/libQtCore.so.4
#4  0x00007f658ff1731d in ?? () from /usr/lib64/libQtCore.so.4
#5  0x00007f658ff17695 in ?? () from /usr/lib64/libQtCore.so.4
#6  0x00007f658ff1615c in ?? () from /usr/lib64/libQtCore.so.4
#7  0x00007f658ff16205 in ?? () from /usr/lib64/libQtCore.so.4
#8  0x00007f658b795087 in g_main_context_prepare () from /lib64/libglib-2.0.so.0
#9  0x00007f658b795fa9 in ?? () from /lib64/libglib-2.0.so.0
#10 0x00007f658b796650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#11 0x00007f658ff16956 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#12 0x00007f658feeb032 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#13 0x00007f658feeb245 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#14 0x00007f658fe001e4 in QThread::exec() () from /usr/lib64/libQtCore.so.4
#15 0x00007f658fecc948 in ?? () from /usr/lib64/libQtCore.so.4
#16 0x00007f658fe02a5e in ?? () from /usr/lib64/libQtCore.so.4
#17 0x00007f658fb73a3f in start_thread () from /lib64/libpthread.so.0
#18 0x00007f658e92e66d in clone () from /lib64/libc.so.6
#19 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f6591225760 (LWP 1700)):
[KCrash Handler]
#6  0x00007f65769275b4 in GroupingContainment::sceneEventFilter(QGraphicsItem*, QEvent*) () from /usr/lib64/libplasma_groupingcontainment.so.4
#7  0x00007f658f68544a in ?? () from /usr/lib64/libQtGui.so.4
#8  0x00007f658f685505 in ?? () from /usr/lib64/libQtGui.so.4
#9  0x00007f658f68641f in ?? () from /usr/lib64/libQtGui.so.4
#10 0x00007f658f6869f2 in ?? () from /usr/lib64/libQtGui.so.4
#11 0x00007f658f686dd4 in QGraphicsScene::mouseMoveEvent(QGraphicsSceneMouseEvent*) () from /usr/lib64/libQtGui.so.4
#12 0x00007f658f698eab in QGraphicsScene::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#13 0x00007f658f09ad14 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#14 0x00007f658f0a322a in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#15 0x00007f6590b8f9e6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#16 0x00007f658feebbdc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#17 0x00007f658f6af67f in QGraphicsViewPrivate::mouseMoveEventHandler(QMouseEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f658f6af87e in QGraphicsView::mouseMoveEvent(QMouseEvent*) () from /usr/lib64/libQtGui.so.4
#19 0x00007f658f0ec56c in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#20 0x00007f658f490906 in QFrame::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#21 0x00007f658f6b38bb in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#22 0x00007f658feebd67 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#23 0x00007f658f09ace1 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#24 0x00007f658f0a3aac in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#25 0x00007f6590b8f9e6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#26 0x00007f658feebbdc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#27 0x00007f658f09bd25 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) () from /usr/lib64/libQtGui.so.4
#28 0x00007f658f119e08 in ?? () from /usr/lib64/libQtGui.so.4
#29 0x00007f658f119285 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#30 0x00007f658f1400f2 in ?? () from /usr/lib64/libQtGui.so.4
#31 0x00007f658b795bd3 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0
#32 0x00007f658b7963b0 in ?? () from /lib64/libglib-2.0.so.0
#33 0x00007f658b796650 in g_main_context_iteration () from /lib64/libglib-2.0.so.0
#34 0x00007f658ff168ff in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#35 0x00007f658f13fd8e in ?? () from /usr/lib64/libQtGui.so.4
#36 0x00007f658feeb032 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#37 0x00007f658feeb245 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#38 0x00007f658feef68b in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#39 0x00007f6580592da8 in kdemain () from /usr/lib64/libkdeinit4_plasma-desktop.so
#40 0x00000000004075e9 in _start ()