FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b80)

A DESCRIPTION OF THE PROBLEM :
After run this code the font in a JSpinner is bold. However if don't use the methods setEditor() (see a string with a comment "!!!") the font is plain.

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

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Font remains the same
ACTUAL -
Font changes.

REPRODUCIBILITY :
This bug can be reproduced always.

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

public class Debug {

   public static void main(String[] args) {
     JFrame jFrame = new JFrame();
       jFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         JSpinner editor = new JSpinner();
editor.setEditor(new JSpinner.DefaultEditor(editor)); //!!!
   jFrame.add(editor);
     jFrame.setSize(50, 120);
       jFrame.setVisible(true);
}
}
---------- END SOURCE ----------