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 :
Linux X 2.6.8-2-386 #1 Tue Aug 16 12:46:35 UTC 2005 i686 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
I'm trying to read a serialized jframe which contains a HTMLEditorKit inside.
The writing goes just fine, no exceptions (in 1.6; in 1.5 I get a big NotSerializableException because FocusHighlightPainter doesnt implement Serializable).
Then when I try to read the jframe back, all go fine until I pass the mouse over the jframe (and over the JEditorPane which contains the HTMLEditorKit). At this moment I get a NullPointerException.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Compile the test
2. Execute it. It will create a JFrame, show it, serialize it, dispose the frame, read it back from the file and show it.
3. Pass the mouse over the JFrame

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
After de-serialize, the jframe must work just like the original

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
        at javax.swing.text.GlyphView$GlyphPainter.getNextVisualPositionFrom(GlyphView.java:1281)
        at javax.swing.text.GlyphView.getNextVisualPositionFrom(GlyphView.java:880)
        at javax.swing.text.Utilities.getNextVisualPositionFrom(Utilities.java:963)
        at javax.swing.text.CompositeView.getNextEastWestVisualPositionFrom(CompositeView.java:732)
        at javax.swing.text.CompositeView.getNextVisualPositionFrom(CompositeView.java:457)
        at javax.swing.text.Utilities.getNextVisualPositionFrom(Utilities.java:963)
        at javax.swing.text.CompositeView.getNextEastWestVisualPositionFrom(CompositeView.java:732)
        at javax.swing.text.CompositeView.getNextVisualPositionFrom(CompositeView.java:457)
        at javax.swing.text.Utilities.getNextVisualPositionFrom(Utilities.java:963)
        at javax.swing.text.CompositeView.getNextEastWestVisualPositionFrom(CompositeView.java:732)
        at javax.swing.text.CompositeView.getNextVisualPositionFrom(CompositeView.java:457)
        at javax.swing.text.Utilities.getNextVisualPositionFrom(Utilities.java:963)
        at javax.swing.text.CompositeView.getNextEastWestVisualPositionFrom(CompositeView.java:732)
        at javax.swing.text.CompositeView.getNextVisualPositionFrom(CompositeView.java:457)
        at javax.swing.text.CompositeView.viewToModel(CompositeView.java:393)
        at javax.swing.text.BoxView.viewToModel(BoxView.java:478)
        at javax.swing.plaf.basic.BasicTextUI$RootView.viewToModel(BasicTextUI.java:1539)
        at javax.swing.plaf.basic.BasicTextUI.viewToModel(BasicTextUI.java:1088)
        at javax.swing.text.html.HTMLEditorKit$LinkController.mouseMoved(HTMLEditorKit.java:655)
        at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:312)
        at java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:312)
        at java.awt.Component.processMouseMotionEvent(Component.java:6083)
        at javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3278)
        at java.awt.Component.processEvent(Component.java:5807)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3999)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import java.io.*;
import javax.swing.text.html.*;
import javax.swing.text.*;

/*
 * Original:
 * Created on Apr 19, 2005
 * @author Olivier Picard
 *
 * Modified: Eric Ross, 20061217
 */
public class SerializeEditorPane {

public static void main(String[] args)
    throws IOException, ClassNotFoundException, BadLocationException
{
        
        SerializeEditorPane a = new SerializeEditorPane();
        
        JEditorPane pane = new JEditorPane();
HTMLEditorKit editorKit = new HTMLEditorKit();
        pane.setEditorKit(editorKit);
        
HTMLDocument document = (HTMLDocument) pane.getDocument();
        String html = "<h1>hello</h1>";
editorKit.insertHTML(document, document.getLength(), html, 0, 0, null);

        pane.setEditable(false);
        
        // just to make sure the EditorPane was loaded correctly
        JFrame frame = new JFrame("TESTING");
        frame.setSize(500, 500);
        frame.getContentPane().add(pane);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        
File file = File.createTempFile("test","tmp");
        OutputStream outStream = new FileOutputStream(file);
        ObjectOutputStream out = new ObjectOutputStream(outStream);
        out.writeObject(frame);
        out.flush();
        out.close();

frame.setVisible(false);
frame.dispose();


FileInputStream fis = new FileInputStream(file);
ObjectInputStream in = new ObjectInputStream(fis);
JFrame f = (JFrame) in.readObject();
in.close();
fis.close();

f.setVisible(true);

    }
}
---------- END SOURCE ----------