java TrayIcon using image with transparent background

I am using the following code to set a tray icon in Windows and Linux. It works wonderful in Windows and works okay in Linux. In Linux (Ubuntu) I have my panel set to be (somewhat) transparent and when I add a GIF (with a transparent background) the background of the icon shows up all grey and ugly (see image, green diamond "!")....Any ideas on how to make the GIF image I am adding "keep" its transparent background?

alt text http://unarm.org/stackoverflow/panel_task.jpg

and the image I am using, if you'd like to test:

alt text http://unarm.org/stackoverflow/green_info.gif

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

public class TrayFun {


  static class ShowMessageListener implements ActionListener {
    TrayIcon trayIcon;
    String title;
    String message;
    TrayIcon.MessageType messageType;
    ShowMessageListener(
        TrayIcon trayIcon,
        String title,
        String message,
        TrayIcon.MessageType messageType) {
      this.trayIcon = trayIcon;
      this.title = title;
      this.message = message;
      this.messageType = messageType;
    }
    public void actionPerformed(ActionEvent e) {
      trayIcon.displayMessage(title, message, messageType);
    }
  }

  public static void main(String args[]) {
    Runnable runner = new Runnable() {
      public void run() {
        if (SystemTray.isSupported()) {
          final SystemTray tray = SystemTray.getSystemTray();
          Image image = Toolkit.getDefaultToolkit().getImage("green_info.png");
          PopupMenu popup = new PopupMenu();
          final TrayIcon trayIcon = new TrayIcon(image, "The Tip Text", popup);
          trayIcon.setImageAutoSize(true);

          MenuItem item = new MenuItem("Close");
      item.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
          tray.