Mouse clicks occasionally stop working

Question

I am currently deploying a Java Swing application, and sometimes the end-user encounters an unusual problem whereby they open the application and mouse clicks have no effect. The mouse movement is still tracked fine, as buttons and menus get highlighted as expected when the mouse passes over them. I searched for information about this problem, and learned that a work-around is to click the middle mouse button. This does indeed restore the mouse click behaviour and all continues to work fine after that.
So then I thought I might simulate a middle-button mouse click during my application start-up, in the hope of remedying the problem before any end-user actually sees it. The result is that instead of remedying the problem, I actually cause it to happen every time! The application gets into a state whereby mouse clicks are ignored, and clicking the middle-mouse button restores the mouse click behaviour.
Has anyone else experienced this problem, and know of a way to prevent end-users from experiencing this problem? Here's some example code that demonstrates the behaviour:
import java.awt.Robot;
import java.awt.event.InputEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main
    public static void main(String[] args)
        JFrame frame = new JFrame();
        frame.getContentPane().add(new JButton("Click Me"));
        frame.pack();
        frame.setLocationRelativeTo(null);
        try
            // Simulate a middle-button mouse click
            Robot robot = new Robot();
            robot.mousePress(InputEvent.BUTTON2_MASK);
        catch (Exception e)
            e.printStackTrace();
        frame.setVisible(true);
}Note I'm using Java 1.6.0_07. Any help with this would be much appreciated,
Paul.

Answer 1

import java.awt.Robot;
import java.awt.event.InputEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
public class Main
    public static void main(String[] args)
        JFrame frame = new JFrame();
        frame.getContentPane().add(new JButton("Click Me"));
        frame.pack();
        frame.setLocationRelativeTo(null);
        try
            // Simulate a middle-button mouse click
            Robot robot = new Robot();
            robot.mousePress(InputEvent.BUTTON2_MASK);
            // Simulate a middle-button mouse click again
            robot.mousePress(InputEvent.BUTTON2_MASK);
        catch (Exception e)
            e.printStackTrace();
        frame.setVisible(true);
}?