FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b104)
Java HotSpot(TM) Client VM (build 1.6.0-rc-b104, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
setFocusPainted(false) isn't honored when called on a JButton that is added to a JToolBar.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run the attached test case

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The middle button should NOT paint focus. This appears to be a regression.
ACTUAL -
The middle button paints focus.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JToolBar;

public class ToolbarTest {

    public ToolbarTest() {
        JFrame frame = new JFrame();
        JToolBar toolbar = new JToolBar();
        toolbar.setRollover(true);
        JButton jbTest1 = new JButton("TEST1");
        JButton jbTest2 = new JButton("TEST2");
        JButton jbTest3 = new JButton("TEST3");
        jbTest1.setFocusable(false);
        jbTest2.setFocusPainted(false);
        jbTest3.setFocusPainted(true);
        toolbar.add(jbTest1);
        toolbar.add(jbTest2);
        toolbar.add(jbTest3);
        frame.add(toolbar);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
     try {
javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
        new ToolbarTest();
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
setFocusable(false) is the better approach for my purposes, but it doesn't change the fact that this is a regression and breaks an app that I have in production.