Run the following applet in browser:

---- CODE BEGINS ----

import java.applet.*;

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

public class LocationRelativeTo extends Applet
{
  public void init()
  {
    Button b = new Button("B");
    b.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent ae)
        {
          System.out.println("GC: " + getGraphicsConfiguration());
        }
      }
    );
    add(b);
  }

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

---- CODE ENDS ----

Move the browser window with the applet from one screen to another and back and press the button on each screen. If you see the printed GC always being the same (screen where the browser window was initially shown), then the bug is reproduced.

The described behavior is observed on all the platforms. This is not a regression as the bug can be seen with at least 6.0 and current 7.0 builds.