Version:            (using KDE 4.3.1)
OS:                Linux
Installed from:    SuSE RPMs

I have a Compaq nc6320 notebook which includes a touch pad. If I want to change any mouse property in the KDE system & setting (e.g. doubleclick opens files instead of single click, mouse's layout is left-hand instead of right-hand, etc.) while an USB mouse is plugged into the notebook (i.e. there are more than one mouse devices in the system), the system & settings application crashes immediately. Sometimes the settings I've done come into effect, but seemingly not saved into the configuration. For example I switched to reverse scrolling, applied it, then system & settings crashed. At this point scolling became suddenly reverse in firefox, but after starting system & settings -> mouse settings again (which crashed of course) scrolling become the dafault again.

Here is a backlog from the crashed application:

Application: Rendszerbeállítások (systemsettings), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f0d2aa1ac13 in usb_control_msg () from /usr/lib64/libusb-0.1.so.4
#6  0x00007f0d2ac3e06b in ?? () from /usr/lib64/kde4/kcm_input.so
#7  0x00007f0d2ac3e336 in ?? () from /usr/lib64/kde4/kcm_input.so
#8  0x00007f0d2ac3f94b in ?? () from /usr/lib64/kde4/kcm_input.so
#9  0x00007f0d2ac340b5 in ?? () from /usr/lib64/kde4/kcm_input.so
#10 0x00007f0d2ac353c2 in ?? () from /usr/lib64/kde4/kcm_input.so
#11 0x00007f0d36f3e7a7 in KCModuleProxy::save (this=<value optimized out>) at /usr/src/debug/kdelibs-4.3.1/kutils/kcmoduleproxy.cpp:273
#12 0x00007f0d36d0b63c in ModuleView::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib64/libsystemsettingsview.so
#13 0x00007f0d351a091c in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib64/libQtCore.so.4
#14 0x00007f0d362eb0a7 in QAbstractButton::clicked(bool) () from /usr/lib64/libQtGui.so.4
#15 0x00007f0d3604cd5b in ?? () from /usr/lib64/libQtGui.so.4
#16 0x00007f0d3604e96b in ?? () from /usr/lib64/libQtGui.so.4
#17 0x00007f0d3604ebb5 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib64/libQtGui.so.4
#18 0x00007f0d35d54d50 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#19 0x00007f0d35d0630c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#20 0x00007f0d35d0d421 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#21 0x00007f0d369008d6 in KApplication::notify (this=0x7fffdbeddce0, receiver=0x8ec2f0, event=0x7fffdbedbdd0) at /usr/src/debug/kdelibs-4.3.1/kdeui/kernel/kapplication.cpp:302
#22 0x00007f0d3518b76c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#23 0x00007f0d35d0ccf0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib64/libQtGui.so.4
#24 0x00007f0d35d72d4e in ?? () from /usr/lib64/libQtGui.so.4
#25 0x00007f0d35d71dea in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#26 0x00007f0d35d99b4c in ?? () from /usr/lib64/libQtGui.so.4
#27 0x00007f0d320f4e6e in g_main_dispatch (context=<value optimized out>) at gmain.c:1960
#28 IA__g_main_context_dispatch (context=<value optimized out>) at gmain.c:2513
#29 0x00007f0d320f8838 in g_main_context_iterate (context=0x643440, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>) at gmain.c:2591
#30 0x00007f0d320f8960 in IA__g_main_context_iteration (context=0x643440, may_block=1) at gmain.c:2654
#31 0x00007f0d351b3ce6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#32 0x00007f0d35d992fe in ?? () from /usr/lib64/libQtGui.so.4
#33 0x00007f0d3518a072 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#34 0x00007f0d3518a444 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#35 0x00007f0d3518c5f9 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#36 0x000000000040cbd9 in _start ()