JSlider pointer not moving in sync with lables for Motif L&F

Steps to reproduce the same,
1. Run the sample application provided at the end.
2. Change the L&F to Motif.
3. Move the slider.

Notice that the slider pointer does not match with the labels painted.



-- Sample Code --
/* JDK1.2
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.swing.*;
import java.lang.reflect.*;
*/


/* JDK1.1.X */
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import com.sun.java.swing.*;
import java.lang.reflect.*;



public class TestJS extends JFrame implements ActionListener{
Container content;
JPanel mainpanel;
JPanel panel;
JSlider slider;
JMenuBar menubar;

static String strMotif = "Motif";
static String motifClassName = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
static char cMotif = 'o';

static String strWindows = "Windows";
static String windowsClassName = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
static char cWindows = 'W';

static String strMetal = "Metal";
static String metalClassName = "com.sun.java.swing.plaf.metal.MetalLookAndFeel";
static char cMetal = 'M';


TestJS(String[] args) {
content = getContentPane();
content.setLayout(new BorderLayout());
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent event){
System.exit(0);
}
}
);

mainpanel = new JPanel();
mainpanel.setLayout(new GridLayout(0, 2, 8, 8));

//// Slider 1
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Slider 1"));
slider = new JSlider(JSlider.HORIZONTAL, 0, 20, 0);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
slider.setPaintTicks(true);
slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(2);

slider.setPaintLabels(true);

slider.setSnapToTicks(true);
panel.add(slider);

mainpanel.add(panel);



//// Slider 2
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Slider 2"));
slider = new JSlider(JSlider.HORIZONTAL, 0, 20, 0);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
slider.setPaintTicks(true);

slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(1);

slider.setPaintLabels(true);

slider.setSnapToTicks(true);
panel.add(slider);

mainpanel.add(panel);

//// Slider 3
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Slider 3"));
slider = new JSlider(JSlider.VERTICAL, 0, 20, 0);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
slider.setPaintTicks(true);

slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(2);

slider.setPaintLabels(true);

slider.setSnapToTicks(true);
panel.add(slider);

mainpanel.add(panel);



//// Slider 4
panel = new JPanel();
panel.setBorder(BorderFactory.createTitledBorder("Slider 4"));
slider = new JSlider(JSlider.VERTICAL, 0, 20, 0);
slider.putClientProperty("JSlider.isFilled", Boolean.TRUE);
slider.setPaintTicks(true);

slider.setMajorTickSpacing(10);
slider.setMinorTickSpacing(1);

slider.setPaintLabels(true);

slider.setSnapToTicks(true);
panel.add(slider);

mainpanel.add(panel);



menubar = GetLNFMenuBar();
content.add("North", menubar);
content.add("Center", mainpanel);
pack();
show();
}


public void actionPerformed(ActionEvent e) {
String str = e.getActionCommand();
if(str.equals(metalClassName) || str.equals(windowsClassName) || str.equals(motifClassName)) {
changeLNF(str);
}
}

public void changeLNF(String str) {
System.out.println("Changing LNF to " + str);
try {
UIManager.setLookAndFeel(str);
SwingUtilities.updateComponentTreeUI(TestJS.this);
TestJS.this.pack();
}
catch (Exception exc) {
showErrorDialog(str);
}
}

public void showErrorDialog(String str) {
JLabel label = new JLabel("Could not load L&F : " + str);
JOptionPane.showMessageDialog(null, label, "Error", JOptionPane.ERROR_MESSAGE);
}


public JMenuBar GetLNFMenuBar() {
JMenuBar mbar = new JMenuBar();
JMenu m = new JMenu("Look and Feel");
m.setMnemonic('L');
ButtonGroup bg = new ButtonGroup();

JRadioButtonMenuItem mi;

mi = new JRadioButtonMenuItem(strMetal);
mi.addActionListener(this);
mi.setActionCommand(metalClassName);
mi.setMnemonic(cMetal);
mi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_1, ActionEvent.ALT_MASK));
mi.setSelected(true);
bg.add(mi);
m.add(mi);


mi = new JRadioButtonMenuItem(strWindows);
mi.addActionListener(this);
mi.setActionCommand(windowsClassName);
mi.setMnemonic(cWindows);
mi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_2, ActionEvent.ALT_MASK));
bg.add(mi);
m.add(mi);


mi = new JRadioButtonMenuItem(strMotif);
mi.addActionListener(this);
mi.setActionCommand(motifClassName);
mi.setMnemonic(cMotif);
mi.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_3, ActionEvent.ALT_MASK));
bg.add(mi);
m.add(mi);

mbar.add(m);
return mbar;
}

// Main funtion
public static void main(String[] args) {
TestJS TestJS = new TestJS(args);
}
}

-- Sample Code --