Mediumweight popup problem on Solaris

There is a problem with Mediumwieghts not popping up on Solaris in 1.2:

import java.awt.*;
import com.sun.java.swing.*;

public class Test extends JPanel {

    public Test() {
setLayout(new BorderLayout());
JComboBox screenCombo = new JComboBox();
screenCombo.setLightWeightPopupEnabled(false);
for (int i = 0; i < 20; i++)
screenCombo.addItem(String.valueOf(i) + " Item");
add("North", screenCombo);
JPanel jp = new JPanel(new GridLayout(0,3));
jp.add(new jpanel());
jp.add(new panel());
jp.add(new canvas());
add(jp);
    }

    public static void main(String s[]) {
JFrame f = new JFrame("ComboBox Test");
f.getContentPane().add("Center", new Test());
f.pack();
f.setSize(new Dimension(300,300));
f.show();
    }

class jpanel extends JPanel {
    jpanel() { setBackground(Color.black); }
}

class panel extends Panel {
    panel() { setBackground(Color.blue); }
}

class canvas extends Canvas {
    canvas() { setBackground(Color.red); }
}

} // end Test