FULL PRODUCT VERSION :
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Client VM (build 1.5.0_01-b08, mixed mode, sharing)


ADDITIONAL OS VERSION INFORMATION :
Windows 2000 Prof. SP4
(under Windows XP the problem seems NOT to occur)

EXTRA RELEVANT SYSTEM CONFIGURATION :
Tried on 3 very different machines with Windows 2000 - all behaved equally. So it seems no to depend on hardware and network.

A DESCRIPTION OF THE PROBLEM :
JRE fails to update most of or parts of the GUI after releasing a locked Windows 2000 workstation approx. every second or third try.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.) Start sample program under JRE 1.5.0_01 on Windows 2000 SP4
2.) Press <Ctrl>-<Alt>-<Del>, so that the Windows Security Dialog box appears
3.) Press <Esc> to return to the desktop - when using the sample program the text "This text disappears sometimes ..." has disappeared
4.) If the text has not disappeared, repeat steps 2 and 3

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The text "This text disappears sometimes ..." appears always, when the GUI of the sample program is repainted.
ACTUAL -
Often the text "This text disappears sometimes ..." is missing. The progress bar would also be missing - if the sample program would not update the progress bar every second.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
No error messages occured.

REPRODUCIBILITY :
This bug can be reproduced often.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.event.*;

public class Test extends JFrame
{
    static JProgressBar progress = new JProgressBar(0, 100);

	public Test()
	{
        JPanel panel = new JPanel(true);
        panel.setOpaque(true);
        panel.add(new JLabel("This text disappears sometimes ..."));
        panel.add(progress);
        this.setContentPane(panel);
        this.addWindowListener(new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                System.exit(0);
            }
        });
        this.pack();
        this.setVisible(true);
	}

	public static void main(String[] args)
	{
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                new Test();
            }
        });
        // Update progress bar periodically
         ActionListener taskPerformer = new ActionListener()
         {
             public void actionPerformed(ActionEvent evt)
             {
                 progress.setValue((progress.getValue() + 1) % 100);
             }
         };
        Timer timer = new Timer(1000, taskPerformer);
        timer.start();
	}
}

---------- END SOURCE ----------

Release Regression From : 1.4.2
The above release value was the last known release where this 
bug was known to work. Since then there has been a regression.
###@###.### 2005-04-12 22:31:43 GMT