A DESCRIPTION OF THE REGRESSION :
Swing JButton(s) when setEnabled(false) under Windows XP with the Royale theme don't render correctly.

REPRODUCIBLE TESTCASE OR STEPS TO REPRODUCE:
/*
 * RegressionFrame.java
 *
 * Created on February 18, 2006, 5:35 PM
 */

package regressiontest;

/**
 *
 * @author Daniel Spiewak
 */
public class RegressionFrame extends javax.swing.JFrame {

/** Creates new form RegressionFrame */
public RegressionFrame() {
initComponents();
}

/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
    // <editor-fold defaultstate="collapsed" desc=" Generated Code ">
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        jButton1 = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();
        jButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        jLabel1.setText("This button works just fine:");

        jButton1.setText("Working Button");

        jLabel2.setText("This button doesn't work right:");

        jButton2.setText("Nonworking Button");
        jButton2.setEnabled(false);

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(jLabel1)
                    .add(jLabel2))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 101, Short.MAX_VALUE)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING, false)
                    .add(jButton2, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .add(jButton1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(jButton1))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
                .add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel2)
                    .add(jButton2))
                .addContainerGap(40, Short.MAX_VALUE))
        );
        pack();
    }// </editor-fold>

/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new RegressionFrame().setVisible(true);
}
});
}

    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    // End of variables declaration

}

RELEASE LAST WORKED:
5.0

RELEASE TEST FAILS:
mustang-b70

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The JButton should have been grayed out just as native buttons do or JButton(s) did in 5.0.
ACTUAL -
The JButton was whited out with a black, rectangular border.

APPLICATION NAME: Any swing app APPLICATION VERSION: any

OBSERVED APPLICATION IMPACT:
Swing applications depend on fidelity to the platform, especially on Windows. This is a breach in the fidelity and really anyone who codes in Swing would be effected.