Application that crashed: ksysguard
Version of the application: 4.3.1 (KDE 4.3.1)
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-2-amd64 x86_64

What I was doing when the application crashed:
Right clicked the Network History module, click on "Properties". Looked at the various tabs, then clicked OK button, no changes made. System Monitor closed, KDE crash handler apologised and asked for bug report :). Repeated process about three times, crash duplicated each time. Running Debian testing, which is an eclectic mix of 4.3.1 and 4.3.2 - System MOnitor 'About' shows 3.2.1. 

 -- Backtrace:
Application: System Monitor (kdeinit4), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  QColor (this=0x31) at /usr/include/qt4/QtGui/qcolor.h:259
#6  SensorModelEntry::color (this=0x31) at ../../../ksysguard/gui/SensorDisplayLib/SensorModel.cc:95
#7  0x00007fa1fca1eda5 in FancyPlotter::applySettings (this=0x1ab69c0) at ../../../ksysguard/gui/SensorDisplayLib/FancyPlotter.cc:260
#8  0x00007fa1fca1fddd in FancyPlotter::qt_metacall (this=0x1ab69c0, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=<value optimized out>) at ./FancyPlotter.moc:75
#9  0x00007fa2087f3df2 in QMetaObject::activate (sender=0x1efdc60, from_signal_index=<value optimized out>, to_signal_index=43, argv=0x2) at kernel/qobject.cpp:3112
#10 0x00007fa20733556a in KDialog::slotButtonClicked (this=0x1efdc60, button=8) at ../../kdeui/dialogs/kdialog.cpp:857
#11 0x00007fa207337725 in KDialog::qt_metacall (this=0x1efdc60, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdb362860) at ./kdialog.moc:184
#12 0x00007fa2073ec686 in KPageDialog::qt_metacall (this=0x7fffdb3624e0, _c=49, _id=35280976, _a=0x2) at ./kpagedialog.moc:64
#13 0x00007fa1fca21515 in FancyPlotterSettings::qt_metacall (this=0x7fffdb3624e0, _c=49, _id=35280976, _a=0x2) at ./FancyPlotterSettings.moc:68
#14 0x00007fa2087f3df2 in QMetaObject::activate (sender=0x1cef1c8, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x2) at kernel/qobject.cpp:3112
#15 0x00007fa2087f6a6e in QSignalMapper::mapped (this=0x7fffdb3624e0, _t1=8) at .moc/release-shared/moc_qsignalmapper.cpp:95
#16 0x00007fa2087f7310 in QSignalMapper::map (this=0x1cef1c8, sender=0x1d1d840) at kernel/qsignalmapper.cpp:266
#17 0x00007fa2087f7ef0 in QSignalMapper::qt_metacall (this=0x1cef1c8, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fffdb3629e0) at .moc/release-shared/moc_qsignalmapper.cpp:81
#18 0x00007fa2087f3df2 in QMetaObject::activate (sender=0x1d1d840, from_signal_index=<value optimized out>, to_signal_index=30, argv=0x2) at kernel/qobject.cpp:3112
#19 0x00007fa206d7a037 in QAbstractButton::clicked (this=0x7fffdb3624e0, _t1=false) at .moc/release-shared/moc_qabstractbutton.cpp:200
#20 0x00007fa206ad930b in QAbstractButtonPrivate::emitClicked (this=0x21a11e0) at widgets/qabstractbutton.cpp:543
#21 0x00007fa206adaf1b in QAbstractButtonPrivate::click (this=0x21a11e0) at widgets/qabstractbutton.cpp:536
#22 0x00007fa206adb175 in QAbstractButton::mouseReleaseEvent (this=0x1d1d840, e=0x7fffdb363330) at widgets/qabstractbutton.cpp:1115
#23 0x00007fa2067b837f in QWidget::event (this=0x1d1d840, event=0x7fffdb363330) at kernel/qwidget.cpp:7554
#24 0x00007fa20676801d in QApplicationPrivate::notify_helper (this=0x17c6c80, receiver=0x1d1d840, e=0x7fffdb363330) at kernel/qapplication.cpp:4065
#25 0x00007fa2067707ca in QApplication::notify (this=<value optimized out>, receiver=0x1d1d840, e=0x7fffdb363330) at kernel/qapplication.cpp:3767
#26 0x00007fa2073c10db in KApplication::notify (this=0x17c6b80, receiver=0x1d1d840, event=0x7fffdb363330) at ../../kdeui/kernel/kapplication.cpp:302
#27 0x00007fa2087dec9c in QCoreApplication::notifyInternal (this=0x17c6b80, receiver=0x1d1d840, event=0x7fffdb363330) at kernel/qcoreapplication.cpp:610
#28 0x00007fa20676fa78 in QCoreApplication::sendSpontaneousEvent (receiver=0x1d1d840, event=0x7fffdb363330, alienWidget=0x1d1d840, nativeWidget=0x1efdc60, buttonDown=<value optimized out>, 
    lastMouseReceiver=...) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#29 QApplicationPrivate::sendMouseEvent (receiver=0x1d1d840, event=0x7fffdb363330, alienWidget=0x1d1d840, nativeWidget=0x1efdc60, buttonDown=<value optimized out>, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#30 0x00007fa2067d8659 in QETWidget::translateMouseEvent (this=0x1efdc60, event=<value optimized out>) at kernel/qapplication_x11.cpp:4411
#31 0x00007fa2067d740f in QApplication::x11ProcessEvent (this=0x17c6b80, event=0x7fffdb364d00) at kernel/qapplication_x11.cpp:3552
#32 0x00007fa2067ff76c in x11EventSourceDispatch (s=0x17ca9c0, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#33 0x00007fa20568212a in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#34 0x00007fa205685988 in ?? () from /lib/libglib-2.0.so.0
#35 0x00007fa205685b3c in g_main_context_iteration () from /lib/libglib-2.0.so.0
#36 0x00007fa20880739c in QEventDispatcherGlib::processEvents (this=0x1735850, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:407
#37 0x00007fa2067fef1f in QGuiEventDispatcherGlib::processEvents (this=0x7fffdb3624e0, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#38 0x00007fa2087dd562 in QEventLoop::processEvents (this=<value optimized out>, flags=...) at kernel/qeventloop.cpp:149
#39 0x00007fa2087dd934 in QEventLoop::exec (this=0x7fffdb365030, flags=...) at kernel/qeventloop.cpp:201
#40 0x00007fa2087dfba4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#41 0x00007fa1fca570f4 in kdemain (argc=1, argv=0x17785a0) at ../../../ksysguard/gui/ksysguard.cc:579
#42 0x0000000000407264 in launch (argc=1, _name=0x17868c8 "/usr/bin/ksysguard", args=<value optimized out>, cwd=0x0, envc=1, envs=0x17868ef "", reset_env=false, tty=0x0, avoid_loops=false, 
    startup_id_str=0x17868f8 "debian-main-pc;1257212468;841464;3640_TIME5741743") at ../../kinit/kinit.cpp:677
#43 0x0000000000407a28 in handle_launcher_request (sock=8, who=<value optimized out>) at ../../kinit/kinit.cpp:1169
#44 0x0000000000407fae in handle_requests (waitForPid=0) at ../../kinit/kinit.cpp:1362
#45 0x000000000040863b in main (argc=2, argv=0x7fffdb366128, envp=0x7fffdb366140) at ../../kinit/kinit.cpp:1793

This bug may be a duplicate of or related to bug 203382

Reported using DrKonqi