The problem with Java version 7u51

Steps to reproduce:
1. hit "choose color"
2. Pick some colors under the "Swatches" tab, see the recent gets populated.
3. Click Ok.
4. Repeat 1 -3, so the recent gets populated nicely.
5. Hit F5.
6. Choose some color
7. The moment you pick some colours again, the exception appears.

Reproducer:

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

public class Chooser extends JApplet {
    private static JColorChooser chooser = new JColorChooser();

    @Override
    public void init() {
        final JButton b = new JButton("Choose Color");
        b.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("pop");
                ActionListener okListener = new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        System.out.println("OK");
                    }
                };
                ActionListener cancelListener = new ActionListener() {
                    @Override
                    public void actionPerformed(ActionEvent e) {
                        System.out.println("CANCEL");
                    }
                };
                final JDialog d = JColorChooser.createDialog(null,
"replication", true, chooser, okListener, cancelListener);
                d.setVisible(true);
            }
        });
        add(b);
        super.init();
    }

    public static void main(String[] args) {

    }
}