My ToggleButton doesn't work anymore! (code)

Question

I've extended JToggleButton to toggle the visibility of a JFrame. Click it once, the button is selected and the frame is visible. Click it again, the button is deselected and the frame is hidden.
At least that's how it used to work! I recently lost a hard drive and restored all my projects to a fresh RedHat 8.0 install with Gnome and j2sdk-1.4.1_02-fcs. Previously I was running Mandrake 8.1 with Ximian Gnome and j2sdk-1.4.0-rc. Now when I activate the toggle button, the window appears; but when I click it again, it remains activated and the window is not hidden. Both windows flicker though.
I have run into weird problems with various window managers in the past, like not respecting the modality of a dialog. Having just upgraded my whole environment, though, I don't if it's a quirk of the WM, a bug in the SDK, or what.
Could somebody test this code and tell me if it works?
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class ToggleTest {
public static void main(String[] args) {
     JFrame toggleFrame = new JFrame("Toggle Test");
     JFrame buttonFrame = new JFrame("Toggle Test");
     JPanel panel = new JPanel();
     panel.setBorder(new javax.swing.border.EmptyBorder(20, 20, 20, 20));
     JLabel label = new JLabel("This is only a test.");
     panel.add(label);
     toggleFrame.setContentPane(panel);
     toggleFrame.pack();
     toggleFrame.setResizable(false);
     panel = new JPanel();
     panel.setBorder(new javax.swing.border.EmptyBorder(30, 30, 30, 30));
     panel.add(new PanelButton(toggleFrame, "Click Me!"));
     buttonFrame.setContentPane(panel);
     buttonFrame.pack();
     buttonFrame.setResizable(false);
     buttonFrame.setVisible(true);
private static class PanelButton extends JToggleButton {
     private final JFrame frame;
     public PanelButton(JFrame f, String label) {
          super(label);
          frame = f;
          /* initial button state */
          setSelected(frame.isVisible());
          /* when frame closes, deselect button */
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    setSelected(false);     
          /* when button is toggled, show/hide window */
          addChangeListener(new ChangeListener() {
               public void stateChanged(ChangeEvent e) {
                    frame.setVisible(isSelected());
} /* end inner class PanelButton */
}

Answer 1

I changed the button's ChangeListener to an ActionListener and it works.
Now I'm not sure if it ever worked. I'm pretty sure it did, but I went through my incremental backups and it's always been a ChangeListener.