KDesktop setting crash in Trinity on Ubuntu

#0  KConfigBase::writeEntry (this=0x1206f00, pKey=0x7f54cf2724cb "exclude",
    list=..., sep=44 ',', bPersistent=true, bGlobal=false, bNLS=false,
    bExpand=false)
    at /tmp/buildd/kdelibs-trinity-3.5.13/kdecore/kconfigbase.cpp:1467
#1  0x00007f54d5c0de64 in KConfigBase::writeEntry (this=<optimized out>,
    pKey=<optimized out>, list=..., sep=<optimized out>,
    bPersistent=<optimized out>, bGlobal=<optimized out>, bNLS=false)
    at /tmp/buildd/kdelibs-trinity-3.5.13/kdecore/kconfigbase.cpp:1445
#2  0x00007f54cf261f96 in DesktopBehavior::saveMediaListView (this=0x1297f50)
    at /tmp/buildd/kdebase-trinity-3.5.13/kcontrol/konq/desktopbehavior_impl.cpp:281
#3  0x00007f54cf2631e8 in DesktopBehavior::save (this=0x1297f50)
    at /tmp/buildd/kdebase-trinity-3.5.13/kcontrol/konq/desktopbehavior_impl.cpp:395
#4  0x00007f54cf264281 in DesktopBehaviorModule::save (this=0x11ffa80)
    at /tmp/buildd/kdebase-trinity-3.5.13/kcontrol/konq/desktopbehavior_impl.h:72
#5  0x00007f54d7e8fd7e in KCModuleProxy::save (this=0x12390a0)
    at /tmp/buildd/kdelibs-trinity-3.5.13/kutils/kcmoduleproxy.cpp:533
#6  0x00007f54d7e7efea in KCMultiDialog::apply (this=0x11b25c0)
    at /tmp/buildd/kdelibs-trinity-3.5.13/kutils/kcmultidialog.cpp:147
#7  0x00007f54d6486c54 in KDialogBase::qt_invoke (this=0x11b25c0, _id=75,
    _o=0x7fffbd6b3d40)
    at /tmp/buildd/kdelibs-trinity-3.5.13/obj-x86_64-linux-gnu/kdeui/kdialogbase.moc:360
#8  0x00007f54d4fbff9e in QObject::activate_signal (this=0x11e8a40,
    clist=<optimized out>, o=0x7fffbd6b3d40) at kernel/qobject.cpp:2407
#9  0x00007f54d4fc00f7 in QObject::activate_signal (this=<optimized out>,
    signal=<optimized out>) at kernel/qobject.cpp:2352
#10 0x00007f54d4fe9d53 in QWidget::event (this=0x11e8a40, e=0x7fffbd6b40c0)
    at kernel/qwidget.cpp:4705
#11 0x00007f54d4f6e45d in internalNotify (e=<optimized out>,
    receiver=<optimized out>, this=<optimized out>)
    at kernel/qapplication.cpp:2638
#12 QApplication::internalNotify (this=<optimized out>, receiver=0x11e8a40,
    e=0x7fffbd6b40c0) at kernel/qapplication.cpp:2564
#13 0x00007f54d4f6eb63 in QApplication::notify (this=0xfb7d80,
    receiver=0x11e8a40, e=0x7fffbd6b40c0) at kernel/qapplication.cpp:2424
#14 0x00007f54d5bea0f9 in KApplication::notify (this=0xfb7d80,
    receiver=0x11e8a40, event=0x7fffbd6b40c0)
    at /tmp/buildd/kdelibs-trinity-3.5.13/kdecore/kapplication.cpp:582
#15 0x00007f54d4f1a0a8 in sendSpontaneousEvent (event=0x7fffbd6b40c0,
    receiver=0x11e8a40) at kernel/qapplication.h:526
#16 QETWidget::translateMouseEvent (this=<optimized out>,
    event=<optimized out>) at kernel/qapplication_x11.cpp:4354
#17 0x00007f54d4f18f3f in QApplication::x11ProcessEvent (this=0xfb7d80,
    event=0x7fffbd6b4640) at kernel/qapplication_x11.cpp:3618
#18 0x00007f54d4f27667 in QEventLoop::processEvents (this=0xff3c50, flags=4)
    at kernel/qeventloop_x11.cpp:195
#19 0x00007f54d4f7fb99 in QEventLoop::enterLoop (this=0xff3c50)
    at kernel/qeventloop.cpp:201
#20 0x00007f54d4f7fb22 in QEventLoop::exec (this=0xff3c50)
    at kernel/qeventloop.cpp:148
#21 0x00007f54d87d387c in kdemain (argc=1, argv=0x7fffbd6b4ee8)
    at /tmp/buildd/kdebase-trinity-3.5.13/kdesktop/main.cc:293
#22 0x00000000004007c4 in main (argc=1, argv=0x7fffbd6b4ee8)
    at /tmp/buildd/kdebase-trinity-3.5.13/obj-x86_64-linux-gnu/kdesktop/kdesktop_kdeinit_executable.cpp:2