Version:           unspecified (using Devel) 
OS:                Linux

plasma-desktop crashes when trying to add the system tray widget.

KDE 4.6.90

Reproducible: Always

Steps to Reproduce:
Try adding the system tray either to a panel, or the plain plasma-desktop.

Actual Results:  
Plasma crashes, even before the system tray is added/visible at all.


Application: Plasma-Desktop-Umgebung (plasma-desktop), signal: Segmentation fault
[Current thread is 1 (Thread 0x7ffff7f9b7a0 (LWP 26853))]

Thread 4 (Thread 0x7fffd6cc0700 (LWP 26854)):
#0  0x00007ffff76b4c23 in select () from /lib/libc.so.6
#1  0x00007ffff47f3741 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007ffff472b0f5 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007ffff44a1d60 in start_thread () from /lib/libpthread.so.0
#4  0x00007ffff76bae2d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7fffd49d0700 (LWP 26856)):
#0  0x00007ffff44a3cb4 in pthread_mutex_lock () from /lib/libpthread.so.0
#1  0x00007fffebf987a3 in g_main_context_prepare () from /usr/lib/libglib-2.0.so.0
#2  0x00007fffebf9966d in ?? () from /usr/lib/libglib-2.0.so.0
#3  0x00007fffebf99d09 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#4  0x00007ffff483c8de in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#5  0x00007ffff4810db2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#6  0x00007ffff4810fb7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#7  0x00007ffff472869f in QThread::exec() () from /usr/lib/libQtCore.so.4
#8  0x00007ffff47f3d8f in ?? () from /usr/lib/libQtCore.so.4
#9  0x00007ffff472b0f5 in ?? () from /usr/lib/libQtCore.so.4
#10 0x00007ffff44a1d60 in start_thread () from /lib/libpthread.so.0
#11 0x00007ffff76bae2d in clone () from /lib/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7fffd3bc1700 (LWP 26859)):
#0  0x00007ffff44a5e3b in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1  0x00007ffff472b50e in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/libQtCore.so.4
#2  0x00007ffff471febf in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007ffff472b0f5 in ?? () from /usr/lib/libQtCore.so.4
#4  0x00007ffff44a1d60 in start_thread () from /lib/libpthread.so.0
#5  0x00007ffff76bae2d in clone () from /lib/libc.so.6
#6  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7ffff7f9b7a0 (LWP 26853)):
[KCrash Handler]
#6  0x00007fffd0453940 in ?? () from /usr/lib/kde4/solid_wicd.so
#7  0x00007fffd125accb in ?? () from /usr/lib/libsolidcontrolnm09.so.4
#8  0x00007fffd125ad4c in Solid::Control::NetworkManagerNm09::networkInterfaces() () from /usr/lib/libsolidcontrolnm09.so.4
#9  0x00007fffd1d807aa in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#10 0x00007fffd1d81eb7 in QObject* KPluginFactory::createInstance<NetworkManagerApplet, QObject>(QWidget*, QObject*, QList<QVariant> const&) () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#11 0x00007ffff4fe23e1 in KPluginFactory::create(char const*, QWidget*, QObject*, QList<QVariant> const&, QString const&) () from /usr/lib/libkdecore.so.5
#12 0x00007ffff720a05f in Plasma::PluginLoader::loadApplet(QString const&, unsigned int, QList<QVariant> const&) () from /usr/lib/libplasma.so.3
#13 0x00007fffd2615e38 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#14 0x00007fffd2613f0e in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#15 0x00007fffd260c566 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#16 0x00007fffd261e980 in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#17 0x00007fffd261f8dc in ?? () from /usr/lib/kde4/plasma_applet_systemtray.so
#18 0x00007ffff482839e in QObject::event(QEvent*) () from /usr/lib/libQtCore.so.4
#19 0x00007ffff3fe72cb in QGraphicsWidget::event(QEvent*) () from /usr/lib/libQtGui.so.4
#20 0x00007ffff39d2174 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#21 0x00007ffff39d6fe1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/libQtGui.so.4
#22 0x00007ffff54e8246 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#23 0x00007ffff4811bbc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/libQtCore.so.4
#24 0x00007ffff4814f2f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/libQtCore.so.4
#25 0x00007ffff483c413 in ?? () from /usr/lib/libQtCore.so.4
#26 0x00007fffebf9929d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#27 0x00007fffebf99a78 in ?? () from /usr/lib/libglib-2.0.so.0
#28 0x00007fffebf99d09 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#29 0x00007ffff483c876 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#30 0x00007ffff3a751be in ?? () from /usr/lib/libQtGui.so.4
#31 0x00007ffff4810db2 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#32 0x00007ffff4810fb7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#33 0x00007ffff48151ab in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#34 0x00007ffff7b98fa3 in kdemain () from /usr/lib/libkdeinit4_plasma-desktop.so
#35 0x00007ffff760817d in __libc_start_main () from /lib/libc.so.6
#36 0x0000000000400611 in _start ()

(sry for the rather uncomplete backtrace, but Arch Linux does not provide packages with debugging symbols, and I currently do not have the time to compile the stuff myself)

Expected Results:  
The system tray widget should be added without any crashes.

I already tried removing all my plasma-related configurations and stuff. It did not work.