JComboBox causing GTK-WARNING and GTK-CRITICAL on Ubuntu 8.04

Question

I was wondering why whenever I use the GTK Look and Feel, my JComboBox's cause GTK issues. They also don't display right...
Here is the code I am using....
import javax.swing.*;
public class ComboBoxDisplayTest extends JFrame
  public ComboBoxDisplayTest()
    try
      UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
      SwingUtilities.updateComponentTreeUI(this);
    catch(Exception ex)
      ex.printStackTrace();
    JComboBox cb = new JComboBox();
    this.add(cb);
    cb.addItem("Item 1");
    cb.addItem("Item 2");
  public static void main(String[] args)
    ComboBoxDisplayTest c = new ComboBoxDisplayTest();
    c.pack();
    c.setVisible(true);
}This is what get's printed onto the terminal when I run the program:
java ComboBoxDisplayTest
(<unknown>:7078): Gtk-WARNING **: Attempting to add a widget with type GtkButton to a GtkComboBoxEntry (need an instance of GtkEntry or of a subclass)
(<unknown>:7078): Gtk-CRITICAL **: gtk_widget_realize: assertion `GTK_WIDGET_ANCHORED (widget) || GTK_IS_INVISIBLE (widget)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failed
(<unknown>:7078): Gtk-CRITICAL **: gtk_paint_box: assertion `style->depth == gdk_drawable_get_depth (window)' failedWhat exactly is going on?
Is there something wrong with my code?
Is there any way to fix this?
Any answers are much appreciated...
Thanks

Answer 1

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6624717
as far as i know (i am using Ubuntu 7.10 & OpenJDK 1.6.0_0-b11 & Sun JDK) not fixed yet ....
Ronald