I filed this bug based on an email I received about feedback on JDK1.4 RC.  

I filed the platform as generic because that information was not given.  

There's another problem I've been having w/ modal dialogs that appears
in JDK1.3.1 & JDK1.4-rc1, but does not appear JDK1.3.0 and did not
appear in JDK1.4-beta3.  Basically the modal dialog comes up, but all of
the components within the dialog are not useable (it's like there's a
glass pane that covers the dialog making the components unusable), only
the dialog close box takes events.  

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class DialogBug extends JFrame implements ActionListener {

    private DialogBug bug;

    public DialogBug() {
        super("Frame");
        bug this;
        getContentPane().setLayout(new FlowLayout());
        JButton b new JButton("Press Me");
        b.addActionListener(this);
        getContentPane().add(b);
        Dimension d Toolkit.getDefaultToolkit().getScreenSize();
        setBounds(d.width/2-120, d.height/2-160, 200, 200);
        addWindowListener(new WindowAdapter() {
                              public void windowClosing(WindowEvent e) {
                                  System.exit(0);
                              }
                          });
        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {
        new MyDialog();
    }


    public class MyDialog extends JDialog implements ActionListener {

        public MyDialog() {
            super(bug, "Modal Dialog", true);
            getContentPane().setLayout(new FlowLayout());
            JButton b new JButton("Threaded");
            b.addActionListener(this);
            getContentPane().add(b);
            b new JButton("Not Threaded");
            b.addActionListener(this);
            getContentPane().add(b);
            Rectangle r bug.getBounds();
            setBounds(r.x, r.y, 200, 200);
            setVisible(true);
        }

        public void actionPerformed(ActionEvent e) {
            String command e.getActionCommand();
            if (command.equals("Threaded")) {
                //
                // The problem appears when threaded otherwise ok...
                //
                Runnable runner new Runnable() {
                    public void run() {
                        JOptionPane.showMessageDialog(null, "Try to press OK button!!!");
                    }
                };
                new Thread(runner).start();
            } else {
                JOptionPane.showMessageDialog(null, "Try to press OK button!!!");
            }
        }
    }


    public static void main(String args[]) {
        new DialogBug();
    }
}