jdk1.1 win32. Checkbox appearance incorrect after mouse selection

Using jdk1.1 for win32, run the following code:

import java.awt.*;
public class check extends java.applet.Applet {
  CheckboxGroup Product_Group;
  Checkbox[] Product_box = new Checkbox[101];

  // Setup grid layout
  GridLayout GL_AppLayout;

  public void init() {
    GL_AppLayout = new GridLayout(0,1);
setLayout(GL_AppLayout);

    // Setup Product radio group
    Product_Group = new CheckboxGroup();
    Product_box[0] = new Checkbox("MAPCON",Product_Group,false);
    Product_box[1] = new Checkbox("BOOST",Product_Group,false);
    Product_box[2] = new Checkbox("All",Product_Group,true);



    // Place components on the screen
    setLayout(GL_AppLayout);
    add(new Label("Product:", java.awt.Label.LEFT));
    add(Product_box[0]);
    add(Product_box[1]);
    add(Product_box[2]);

   }
}

Description:

This applet displays a CheckboxGroup. Once one of the Checkboxes is selected, the
appearance is abnormal.

The 1.1 build is from july 23.

solaris versions of 1.1 (and 1.0.2 of win32) do not appear faulty.