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 AutoResize is set to off for the JTable and you try to reorder the columns using Drag & Drop while the horizontal scroll bar is moved to the right a bit... The horizontal scroll bar will auto-scroll back to the left most position, making it impossible to order the columns how you want.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached source code... scroll to the right a little... and try to reorder the columns.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The scroll bar would stay stationary as I reorder the columns... as it did in previous versions of Java
ACTUAL -
The scroll bar auto-scrolled back to the left

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package com.qw.utilities;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class ColumnReorder {
private static void doTableTest() {
     DefaultTableModel mod = new DefaultTableModel(new String[] {"Column 1", "Column 2"
     , "Column 3", "Column 4", "Column 5", "Column 6", "Column 7", "Column 8"
     , "Column 9", "Column 10", }, 0);
     JTable tbl = new JTable(mod);
     tbl.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     JFrame frm = new JFrame("Demo Column Reorder problem");
     frm.getContentPane().add(new JScrollPane(tbl));
     frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frm.setSize(250, 250);
     frm.setVisible(true);
    }
    
public static void main(String[] args) throws Exception {
doTableTest();
}
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
None that I have found yet.

Release Regression From : 5.0u9
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.