FULL PRODUCT VERSION :
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Client VM (build 1.6.0-b105, mixed mode, sharing)

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

A DESCRIPTION OF THE PROBLEM :
If an action is set on a JButton, the button's text is cleared. Same as 4266524, except for 1.6.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Instantiate a button, set text with setText(), set action with setAction(). Button's text is cleared.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The button's text should be displayed even though an action is set on the button.
ACTUAL -
The button's text is cleared if setAction() is called after setText().

REPRODUCIBILITY :
This bug can be reproduced always.

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

public class TestSetAction extends JPanel {

    public TestSetAction() throws HeadlessException {
        JButton button = new JButton();
        button.setText("setText first");
        button.setAction(new TestAction());
        add(button);
        JButton button2 = new JButton();
        button2.setAction(new TestAction());
        button2.setText("setAction first");
        add(button2);
    }

    private static void createAndShowGUI() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new TestSetAction());
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }

    private class TestAction extends AbstractAction {
        public void actionPerformed(ActionEvent e) {
        }
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
As long as it's possible to call setText() after setAction(), the button displays fine.