FULL PRODUCT VERSION :
java version "1.5.0_06"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)

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

EXTRA RELEVANT SYSTEM CONFIGURATION :
Run within Eclipse, not tested outside Eclipse

A DESCRIPTION OF THE PROBLEM :
The Point returned by Caret.getMagicCaretPosition() is incorect when called on a JTextPane that is inside a JScrollPane when the up and down arrow keys are used to navigate through the text inside the JTextArea.

Please note that I see this behaviour only with the up and down arrow keys, not when the left and right arrow keys are pressed.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Run attached class
2. Type up-arrow three times
3. The output on the console is:

keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]
keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]
keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
keyPressed getMagicCaretPosition = java.awt.Point[x=21,y=48]
keyPressed getMagicCaretPosition = java.awt.Point[x=28,y=32]
keyPressed getMagicCaretPosition = java.awt.Point[x=19,y=16]
ACTUAL -
keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]
keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]
keyPressed getMagicCaretPosition = java.awt.Point[x=18,y=64]

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package com.tf.trans.test;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.HeadlessException;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class BugReport extends JFrame {
    JTextArea editor;


    public BugReport(String arg0) throws HeadlessException {
        super(arg0);
    }


    public static void main(String[] args) {
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                try {
                    BugReport mainFrame = new BugReport("getMagicCaretPosition Bug");
                    mainFrame.createAndShowGUI();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }


    private void createAndShowGUI() {
        JFrame.setDefaultLookAndFeelDecorated(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        rootPane.getContentPane().setLayout(new BorderLayout());

        editor = new JTextArea();
        editor.setText("one\ntwo\nthree\nfour\nfive");
        editor.addKeyListener(new KeyListener() {
            public void keyTyped(KeyEvent arg0) {
            }


            public void keyPressed(KeyEvent arg0) {
            }


            public void keyReleased(KeyEvent arg0) {
                System.out.println("keyPressed getMagicCaretPosition = "
                        + editor.getCaret().getMagicCaretPosition());
            }
        });
        
        JScrollPane editorScrollPane = new JScrollPane(editor);
        editorScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
        editorScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        
        add(editorScrollPane);

        pack();
        setSize(new Dimension(500, 500));
        setVisible(true);
    }
}
---------- END SOURCE ----------