FULL PRODUCT VERSION :
C:\Users\kleopatra>java -version
java version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) Client VM (build 11.2-b01, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
doesn't matter

A DESCRIPTION OF THE PROBLEM :
see java doc of example and discussion in the swinglabs forum:

http://forums.java.net/jive/thread.jspa?threadID=57600&tstart=0

(don't know if it's a regression in the update-releases of 1.6, obviously couldn't have happened earlier than that)

Regards
Jeanette

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
see java doc of example

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
see java doc of example
ACTUAL -
see java doc of example

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * Created on 18.02.2009
 *
 */
package org.jdesktop.swingx.table;

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.RowFilter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;

/**
 * Selection behaviour on insert row at top of model is broken.
 *
 * At start: first row selected, then add rows at top
 *
 * Two (at least, didn't dig deeper ;-)
 *
 * A) inconsistent for with/-out RowSorter -- with: inserted row is not selected
 * -- without: inserted row is selected (while this is a bug morphed into a
 * "feature" ages ago, that's the pre-1.6 behaviour)
 *
 * To reproduce, run the example as-is/commented autoCreateSorter for
 * with/without and press insert button
 *
 *
 * B) selection state is "lost" once a RowFilter had been set
 *
 * To reproduce, run the example as-is and - insert some rows: the selection is
 * kept on the initially selected row (in model coordinates) That's correct
 * behaviour. - toggle the filter on and off again - insert some rows: the
 * selection is kept fixed on the _view_ selection, that's wrong, should behave
 * the same way as before having toggled the filter
 */
public class SelectionIssue {
    public static void main(String[] args) {
        final DefaultTableModel model = new DefaultTableModel(new String[][] {
                { "row0" }, { "row1" } }, new String[] { "col" });
        final JTable table = new JTable();
        // comment this line to get old-selection-extension
        table.setAutoCreateRowSorter(true);
        table.setModel(model);
        table.setRowSelectionInterval(0, 0);

        Action insertRow = new AbstractAction("Insert Row At Top") {

            public void actionPerformed(ActionEvent evt) {
                String text = "row-" + ((model.getRowCount() - 2));
                model.insertRow(0, new String[] { text });
            }
        };

        final RowFilter filter = RowFilter.regexFilter("0$");
        Action toggleFilter = new AbstractAction("toggle filter") {

            @Override
            public void actionPerformed(ActionEvent e) {
                TableRowSorter sorter = (TableRowSorter) table.getRowSorter();
                RowFilter old = sorter.getRowFilter();
                sorter.setRowFilter(old != null ? null : filter);

            }

        };
        toggleFilter.setEnabled(table.getRowSorter() != null);
        JFrame frame = new JFrame("Selection state broken");
        frame.add(new JScrollPane(table));
        frame.add(new JButton(insertRow), BorderLayout.SOUTH);
        frame.add(new JButton(toggleFilter), BorderLayout.NORTH);
        frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
        frame.setSize(400, 400);
        frame.setVisible(true);
    }

}