Application that crashed: ksysguard
Version of the application: 4.3.1 (KDE 4.3.1)
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-rc8-sidux-686 i686
Distribution: Debian GNU/Linux unstable (sid)

What I was doing when the application crashed:
Only the netgraph is affected by the bg color change.
The fault is repeatable.
Moreover, changed scalings does not save.

 -- Backtrace:
Application: System Monitor (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#6  QColor (this=0xffff0000) at /usr/include/qt4/QtGui/qcolor.h:259
#7  SensorModelEntry::color (this=0xffff0000) at ../../../ksysguard/gui/SensorDisplayLib/SensorModel.cc:95
#8  0xb3c3ddb8 in FancyPlotter::applySettings (this=0xa068428) at ../../../ksysguard/gui/SensorDisplayLib/FancyPlotter.cc:260
#9  0xb3c3edc3 in FancyPlotter::qt_metacall (this=0xa068428, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfb0a548) at ./FancyPlotter.moc:75
#10 0xb7f25b33 in QMetaObject::activate (sender=0xa3741d8, from_signal_index=45, to_signal_index=45, argv=0x0) at kernel/qobject.cpp:3112
#11 0xb7f26782 in QMetaObject::activate (sender=0xa3741d8, m=0xb77a5644, local_signal_index=9, argv=0x0) at kernel/qobject.cpp:3186
#12 0xb7567e47 in KDialog::okClicked (this=0xa3741d8) at ./kdialog.moc:252
#13 0xb756a648 in KDialog::slotButtonClicked (this=0xa3741d8, button=4) at ../../kdeui/dialogs/kdialog.cpp:853
#14 0xb756c7b2 in KDialog::qt_metacall (this=0xa3741d8, _c=QMetaObject::InvokeMetaMethod, _id=33, _a=0xbfb0a73c) at ./kdialog.moc:184
#15 0xb7631d8a in KPageDialog::qt_metacall (this=0xa3741d8, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfb0a73c) at ./kpagedialog.moc:64
#16 0xb3c40baa in FancyPlotterSettings::qt_metacall (this=0xa3741d8, _c=QMetaObject::InvokeMetaMethod, _id=69, _a=0xbfb0a73c) at ./FancyPlotterSettings.moc:68
#17 0xb7f25b33 in QMetaObject::activate (sender=0xa36b348, from_signal_index=4, to_signal_index=4, argv=0xbfb0a73c) at kernel/qobject.cpp:3112
#18 0xb7f26782 in QMetaObject::activate (sender=0xa36b348, m=0xb8000d58, local_signal_index=0, argv=0xbfb0a73c) at kernel/qobject.cpp:3186
#19 0xb7f293a3 in QSignalMapper::mapped (this=0xa36b348, _t1=4) at .moc/release-shared/moc_qsignalmapper.cpp:95
#20 0xb7f29c2d in QSignalMapper::map (this=0xa36b348, sender=0xa2ef100) at kernel/qsignalmapper.cpp:266
#21 0xb7f29e1e in QSignalMapper::map (this=0xa36b348) at kernel/qsignalmapper.cpp:257
#22 0xb7f2a6eb in QSignalMapper::qt_metacall (this=0xa36b348, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfb0a8bc) at .moc/release-shared/moc_qsignalmapper.cpp:81
#23 0xb7f25b33 in QMetaObject::activate (sender=0xa2ef100, from_signal_index=29, to_signal_index=30, argv=0xbfb0a8bc) at kernel/qobject.cpp:3112
#24 0xb7f25f60 in QMetaObject::activate (sender=0xa2ef100, m=0xb7421924, from_local_signal_index=2, to_local_signal_index=3, argv=0xbfb0a8bc) at kernel/qobject.cpp:3206
#25 0xb723a9a1 in QAbstractButton::clicked (this=0xa2ef100, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#26 0xb6f66379 in QAbstractButtonPrivate::emitClicked (this=0xa3f13e8) at widgets/qabstractbutton.cpp:543
#27 0xb6f67f64 in QAbstractButtonPrivate::click (this=0xa3f13e8) at widgets/qabstractbutton.cpp:536
#28 0xb6f681f6 in QAbstractButton::mouseReleaseEvent (this=0xa2ef100, e=0xbfb0af5c) at widgets/qabstractbutton.cpp:1115
#29 0xb6c0e77b in QWidget::event (this=0xa2ef100, event=0xbfb0af5c) at kernel/qwidget.cpp:7549
#30 0xb6f6621e in QAbstractButton::event (this=0xa2ef100, e=0xbfb0af5c) at widgets/qabstractbutton.cpp:1077
#31 0xb700fa50 in QPushButton::event (this=0xa2ef100, e=0xbfb0af5c) at widgets/qpushbutton.cpp:662
#32 0xb6bb8814 in QApplicationPrivate::notify_helper (this=0x9ef1128, receiver=0xa2ef100, e=0xbfb0af5c) at kernel/qapplication.cpp:4056
#33 0xb6bc12e1 in QApplication::notify (this=0x9ef0de0, receiver=0xa2ef100, e=0xbfb0af5c) at kernel/qapplication.cpp:3758
#34 0xb76014ad in KApplication::notify (this=0x9ef0de0, receiver=0xa2ef100, event=0xbfb0af5c) at ../../kdeui/kernel/kapplication.cpp:302
#35 0xb7f109cb in QCoreApplication::notifyInternal (this=0x9ef0de0, receiver=0xa2ef100, event=0xbfb0af5c) at kernel/qcoreapplication.cpp:610
#36 0xb6bc036e in QCoreApplication::sendSpontaneousEvent (receiver=0xa2ef100, event=0xbfb0af5c, alienWidget=0xa2ef100, nativeWidget=0xa3741d8, buttonDown=0xb742eaa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#37 QApplicationPrivate::sendMouseEvent (receiver=0xa2ef100, event=0xbfb0af5c, alienWidget=0xa2ef100, nativeWidget=0xa3741d8, buttonDown=0xb742eaa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#38 0xb6c2eea5 in QETWidget::translateMouseEvent (this=0xa3741d8, event=0xbfb0c50c) at kernel/qapplication_x11.cpp:4409
#39 0xb6c2e386 in QApplication::x11ProcessEvent (this=0x9ef0de0, event=0xbfb0c50c) at kernel/qapplication_x11.cpp:3428
#40 0xb6c58892 in x11EventSourceDispatch (s=0x9f15268, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#41 0xb67864b8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0xb6789a13 in ?? () from /usr/lib/libglib-2.0.so.0
#43 0xb6789b98 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0xb7f3b858 in QEventDispatcherGlib::processEvents (this=0x9e84220, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#45 0xb6c57fd5 in QGuiEventDispatcherGlib::processEvents (this=0x9e84220, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb7f0f01a in QEventLoop::processEvents (this=0xbfb0c770, flags=...) at kernel/qeventloop.cpp:149
#47 0xb7f0f462 in QEventLoop::exec (this=0xbfb0c770, flags=...) at kernel/qeventloop.cpp:201
#48 0xb7f118b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0xb6bb8697 in QApplication::exec () at kernel/qapplication.cpp:3525
#50 0xb3c7bbb4 in kdemain (argc=3, argv=0x9ed1aa8) at ../../../ksysguard/gui/ksysguard.cc:579
#51 0x0804e291 in launch (argc=3, _name=0x9ed111c "ksysguard", args=0x9ed1167 "", cwd=0x0, envc=0, envs=0x9ed116c "", reset_env=false, tty=0x0, avoid_loops=false, startup_id_str=0x805109f "0")
    at ../../kinit/kinit.cpp:677
#52 0x0804ea15 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#53 0x0804ef3f in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#54 0x0804f6c9 in main (argc=2, argv=0xbfb0d0b4, envp=0xbfb0d0c0) at ../../kinit/kinit.cpp:1793

Reported using DrKonqi