FULL PRODUCT VERSION :
java version "1.6.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-beta2-b72)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b72, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Linux koffie 2.6.15-1.1833_FC4 #1 Wed Mar 1 23:41:37 EST 2006 i686 athlon i386 GNU/Linux

EXTRA RELEVANT SYSTEM CONFIGURATION :
Running gnome with the clearlooks theme.

A DESCRIPTION OF THE PROBLEM :
An artifact is drawn when selecting a tab which has no 'text' but only has an 'icon'.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the program below and select a tab.
After selecting the artifact is painted.
If the screen repaints the artifact is gone.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
no artifacts
ACTUAL -
artifacts are painted

ERROR MESSAGES/STACK TRACES THAT OCCUR :
no error messages

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.awt.*;

public class Test10
{
  public Test10() throws Exception
  {
    JFrame frame;
    JTabbedPane pane;
    pane = new JTabbedPane();
    pane.add( new JButton("Tab1"), getIcon());
    pane.add( new JButton("Tab2"), getIcon());
    pane.add( new JButton("Tab3"), getIcon());
    pane.add( new JButton("Tab4"), getIcon());
    frame = new JFrame("Test10");
    frame.add(pane);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }

  public Icon getIcon()
  {
    return new Icon(){
        public int getIconHeight()
{ return 11; }

        public int getIconWidth()
          { return 50; }

        public void paintIcon( Component c, Graphics g, int x, int y) {}
      };
    }

  public static void main(String[] args)
  {
    try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
      new Test10();
    }
    catch (Exception ex) {
      ex.printStackTrace();
    }
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
no workaround