FULL PRODUCT VERSION :
java version "1.6.0_25"
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.0-b11, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
Please take a look this video
http://www.youtube.com/watch?v=d8eJXECveqM

I put a JComboBox on the JToolbar, and that JToolbar is on JFrame (Border layout north). When I resize the window, the width of that JComboBox becoming crazy. In that video, although I am using my own L&F, but it doesn't hurt anything, even if I use swing-metal L&F, this problem still exist.

The testing source code is in here:
http://code.google.com/p/petersoft-java-style-2/source/browse/trunk/src/com/petersoft/advancedswing/enhancedtextarea/EnhancedTextArea.java

thanks
from Peter (###@###.###)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run this source:
http://code.google.com/p/petersoft-java-style-2/source/browse/trunk/src/com/petersoft/advancedswing/enhancedtextarea/EnhancedTextArea.java


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package com.petersoft.advancedswing.enhancedtextarea;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GraphicsEnvironment;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.File;

import javax.swing.ComboBoxModel;
import javax.swing.DefaultComboBoxModel;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JToggleButton;
import javax.swing.JToolBar;
import javax.swing.WindowConstants;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter.DefaultHighlightPainter;
import javax.swing.text.Element;
import javax.swing.text.Highlighter;

import com.petersoft.advancedswing.searchtextfield.JSearchTextField;

/**
 * This code was edited or generated using CloudGarden's Jigloo SWT/Swing GUI Builder, which is free for non-commercial use. If Jigloo is being used commercially (ie, by a
 * corporation, company or business for any purpose whatever) then you should purchase a license for each developer using Jigloo. Please visit www.cloudgarden.com for details. Use
 * of Jigloo implies acceptance of these licensing terms. A COMMERCIAL LICENSE HAS NOT BEEN PURCHASED FOR THIS MACHINE, SO JIGLOO OR THIS CODE CANNOT BE USED LEGALLY FOR ANY
 * CORPORATE OR COMMERCIAL PURPOSE.
 */
public class EnhancedTextArea extends JPanel implements LogFileTailerListener, DocumentListener {
        private JToolBar jToolBar1;
        private JScrollPane jScrollPane1;
        private JLabel jLabel1;
        private JComboBox jFontComboBox;
        private JLabel jSearchLabel;
        private JPanel jStatusPanel;
        private JSearchTextField jSearchTextField;
        private JLabel jStatusLabel;
        private JButton jFontBiggerButton;
        private JButton jFontSmallerButton;
        private JToggleButton jLineWrapButton;
        public JTextArea jTextArea;
        private JTextArea lines;
        private int maxRow = -1;

        /**
         * Auto-generated main method to display this JPanel inside a new JFrame.
         */
        public static void main(String[] args) {
                JFrame frame = new JFrame();
                frame.getContentPane().add(new EnhancedTextArea());
                frame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
                frame.pack();
                frame.setVisible(true);
        }

        public EnhancedTextArea() {
                super();
                initGUI();
        }

        private void initGUI() {
                try {
                        BorderLayout thisLayout = new BorderLayout();
                        this.setLayout(thisLayout);
                        this.setPreferredSize(new java.awt.Dimension(725, 290));
                        {
                                jToolBar1 = new JToolBar();
                                this.add(jToolBar1, BorderLayout.NORTH);
                                {
                                        jLineWrapButton = new JToggleButton();
                                        jToolBar1.add(jLineWrapButton);
                                        jLineWrapButton.setText("Wrap");
                                        jLineWrapButton.setIcon(new ImageIcon(getClass().getClassLoader().getResource("com/petersoft/advancedswing/enhancedtextarea/linewrap.png")));
                                        jLineWrapButton.addActionListener(new ActionListener() {
                                                public void actionPerformed(ActionEvent evt) {
                                                        jLineWrapButtonActionPerformed(evt);
                                                }
                                        });
                                }
                                {
                                        jFontBiggerButton = new JButton();
                                        jToolBar1.add(jFontBiggerButton);
                                        jFontBiggerButton.setIcon(new ImageIcon(getClass().getClassLoader().getResource("com/petersoft/advancedswing/enhancedtextarea/font_add.png")));
                                        jFontBiggerButton.addActionListener(new ActionListener() {
                                                public void actionPerformed(ActionEvent evt) {
                                                        jFontBiggerButtonActionPerformed(evt);
                                                }
                                        });
                                }
                                {
                                        jFontSmallerButton = new JButton();
                                        jToolBar1.add(jFontSmallerButton);
                                        jFontSmallerButton.setIcon(new ImageIcon(getClass().getClassLoader().getResource("com/petersoft/advancedswing/enhancedtextarea/font_delete.png")));
                                        jFontSmallerButton.addActionListener(new ActionListener() {
                                                public void actionPerformed(ActionEvent evt) {
                                                        jFontSmallerButtonActionPerformed(evt);
                                                }
                                        });
                                }
                                {
                                        jSearchTextField = new JSearchTextField();
                                        jToolBar1.add(jSearchTextField);
                                        jSearchTextField.setMaximumSize(new java.awt.Dimension(100, 22));
                                        jSearchTextField.setPreferredSize(new java.awt.Dimension(100, 22));
                                        jSearchTextField.setSize(new java.awt.Dimension(100, 22));
                                        jSearchTextField.addKeyListener(new KeyAdapter() {
                                                public void keyReleased(KeyEvent evt) {
                                                        jSearchTextFieldKeyReleased(evt);
                                                }
                                        });

                                }
                                {
                                        jLabel1 = new JLabel();
                                        jToolBar1.add(jLabel1);
                                        jLabel1.setMaximumSize(new java.awt.Dimension(5, 10));
                                }
                                {
                                        GraphicsEnvironment e = GraphicsEnvironment.getLocalGraphicsEnvironment();
                                        Font[] fonts = e.getAllFonts();
                                        String fontNames[] = new String[fonts.length];
                                        int x = 0;
                                        for (Font f : fonts) {
                                                fontNames[x++] = f.getFontName();
                                        }
                                        ComboBoxModel jFontComboBoxModel = new DefaultComboBoxModel(fontNames);
                                        jFontComboBox = new JComboBox();
                                        jToolBar1.add(jFontComboBox);
                                        jFontComboBox.setModel(jFontComboBoxModel);
                                        jFontComboBox.setMaximumSize(new java.awt.Dimension(150, 22));
                                        jFontComboBox.addActionListener(new ActionListener() {
                                                public void actionPerformed(ActionEvent evt) {
                                                        jFontComboBoxActionPerformed(evt);
                                                }
                                        });
                                }
                        }
                        {
                                jScrollPane1 = new JScrollPane();
                                this.add(jScrollPane1, BorderLayout.CENTER);
                                {
                                        jTextArea = new JTextArea(10, 10000);
                                        jTextArea.getDocument().addDocumentListener(this);
                                        lines = new JTextArea(" 1 ");
                                        lines.setBackground(new Color(200, 230, 245));
                                        lines.setEditable(false);
                                        jScrollPane1.setRowHeaderView(lines);

                                        jTextArea.getDocument().addDocumentListener(new DocumentListener() {
                                                public String getText() {
                                                        int caretPosition = jTextArea.getDocument().getLength();
                                                        Element root = jTextArea.getDocument().getDefaultRootElement();
                                                        String text = " 1 " + System.getProperty("line.separator");
                                                        for (int i = 2; i < root.getElementIndex(caretPosition) + 2; i++) {
                                                                text += " " + i + " " + System.getProperty("line.separator");
                                                        }
                                                        return text;
                                                }

                                                @Override
                                                public void changedUpdate(DocumentEvent de) {
                                                        lines.setText(getText());
                                                }

                                                @Override
                                                public void insertUpdate(DocumentEvent de) {
                                                        lines.setText(getText());
                                                }

                                                @Override
                                                public void removeUpdate(DocumentEvent de) {
                                                        lines.setText(getText());
                                                }

                                        });
                                        jScrollPane1.setViewportView(jTextArea);
                                }
                        }
                        {
                                jStatusPanel = new JPanel();
                                FlowLayout jStatusPanelLayout = new FlowLayout();
                                jStatusPanelLayout.setAlignment(FlowLayout.LEFT);
                                jStatusPanel.setLayout(jStatusPanelLayout);
                                this.add(jStatusPanel, BorderLayout.SOUTH);
                                {
                                        jStatusLabel = new JLabel();
                                        jStatusPanel.add(jStatusLabel);
                                }
                                {
                                        jSearchLabel = new JLabel();
                                        jStatusPanel.add(jSearchLabel);
                                }
                        }
                } catch (Exception e) {
                        e.printStackTrace();
                }
        }

        public JTextArea getTextArea() {
                return jTextArea;
        }

        public void setText(String text) {
                jTextArea.setText(text);
        }

        public String getText() {
                return jTextArea.getText();
        }

        private void updateStatus() {
                jStatusLabel.setText("Line:" + jTextArea.getText().split("\n").length + ", Char:" + jTextArea.getText().length());
        }

        private void jLineWrapButtonActionPerformed(ActionEvent evt) {
                jTextArea.setLineWrap(jLineWrapButton.isSelected());
        }

        private void jFontSmallerButtonActionPerformed(ActionEvent evt) {
                Font f = jTextArea.getFont();
                Font newFont = new Font(f.getFontName(), f.getStyle(), f.getSize() - 1);
                jTextArea.setFont(newFont);
                lines.setFont(newFont);
        }

        private void jFontBiggerButtonActionPerformed(ActionEvent evt) {
                Font f = jTextArea.getFont();
                Font newFont = new Font(f.getFontName(), f.getStyle(), f.getSize() + 1);
                jTextArea.setFont(newFont);
                lines.setFont(newFont);
        }

        public void addTrailListener(File file) {
                LogFileTailer tailer = new LogFileTailer(file, 1000, false);
                tailer.addLogFileTailerListener(this);
                tailer.start();
        }

        @Override
        public void newLogFileLine(String line) {
                if (maxRow == -1) {
                        jTextArea.append(line + System.getProperty("line.separator"));
                } else {
                        if (jTextArea.getLineCount() > maxRow) {
                                for (int x = 0; x <= jTextArea.getLineCount() - maxRow; x++) {
                                        try {
                                                jTextArea.replaceRange("", jTextArea.getLineStartOffset(0), jTextArea.getLineEndOffset(0));
                                        } catch (BadLocationException e) {
                                        }
                                }
                        }
                        jTextArea.append(line + System.getProperty("line.separator"));
                }
                jTextArea.setCaretPosition(jTextArea.getDocument().getLength());
                updateStatus();
        }

        private void jSearchTextFieldKeyReleased(KeyEvent evt) {
                String text = jTextArea.getText().toLowerCase();
                String searchPattern = jSearchTextField.getText().toLowerCase();

                if (evt != null && evt.getKeyCode() == 10) {
                        int caretPosition = jTextArea.getCaretPosition();
                        boolean found = false;
                        for (int j = caretPosition + 1; j < text.length() - searchPattern.length(); j += 1) {
           


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