To reproduce this bug, log in under OpenWindows and run the following test case:

import java.awt.event.*;
import java.awt.*;

public class dlg extends Dialog
{
    Frame f;
    Button bLarger, bSmaller, bCheck, bToggle;

    public static void main( String args[] )
    {
        Frame frame = new Frame("Parent Frame");
        frame.add(new Button("Button"));
        frame.setSize(100,100);
        frame.show();

        dlg Dlg = new dlg(frame);
        Dlg.showd();
    }

    public dlg(Frame f_)
    {
        super(f_, "Dialog", true);
        f = f_;
        setSize(200,200);
        //setResizable(false);
        bLarger = new Button("Larger");
        bLarger.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                setSize(400,400);
            }
        });
        bSmaller = new Button("Smaller");
        bSmaller.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                setSize(200,100);
            }
        });
        bCheck = new Button("Resizable?");
        bCheck.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (isResizable())
                    System.out.println("Dialog is resizable");
                else
                    System.out.println("Dialog is not resizable");
            }
        });
        bToggle = new Button("Toggle");
        bToggle.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if (isResizable()) {
                    setResizable(false);
                    System.out.println("Dialog is now not resizable");
                }
                else {
                    setResizable(true);
                    System.out.println("Dialog is now resizable");
                }
            }
        });
        setLayout(new GridLayout(1,4));
        add(bSmaller);
        add(bLarger);
        add(bCheck);
        add(bToggle);

/*
        addComponentListener(new ComponentListener() {
            public void componentResized(ComponentEvent e) {
                System.out.println("Dialog resized");
            }
            public void componentMoved(ComponentEvent e) {
                System.out.println("Dialog moved");
            }
            public void componentShown(ComponentEvent e) {
                System.out.println("Dialog shown");
            }
            public void componentHidden(ComponentEvent e) {
                System.out.println("Dialog hidden");
            }
        });
*/
    }

    public void showd() {
        setVisible(true);
    }
}

The Dialog will appear without any window decorations. The decorations appear
normally under cricket. Note that if you log in under dtwm and change your
window manager to olwm on-the-fly, the decorations appear.