How to reproduce:

$ cat TableSelectionTest.java
import java.awt.BorderLayout;
import javax.swing.DefaultListSelectionModel;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.table.DefaultTableModel;

public class TableSelectionTest extends JFrame {

  private DefaultTableModel model =
    new DefaultTableModel(
      new String[][] { { "a", "b", "c" } },
      new String[] { "c1", "c2", "c3" }
    );

  public TableSelectionTest() {
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    getContentPane().setLayout(new BorderLayout());

    final JTable table = new JTable();

    getContentPane().add(new JScrollPane(table), BorderLayout.CENTER);
    table.getSelectionModel().setSelectionMode(DefaultListSelectionModel.SINGLE_SELECTION);
    table.getSelectionModel().addListSelectionListener(
      new ListSelectionListener() {
        public void valueChanged(ListSelectionEvent e) {

          // we need the contents of the cells in the first column, when selection changes:
          for (int i = e.getFirstIndex(); i <= e.getLastIndex(); i++) {
              try {
                System.out.println(table.getValueAt(i, 0));
   } catch (RuntimeException ex) {
                System.err.println("table.columCount = " + table.getColumnCount());
                System.err.println("table.rowCount = " + table.getRowCount());
                System.err.println("tableModel.columCount = " + table.getModel().getColumnCount());
                System.err.println("tableModel.rowCount = " + table.getModel().getRowCount());
                throw ex;
              }
            }
        }
      }
    );

    table.setModel(model);

    pack();
    setVisible(true);
  }

  public static void main(String[] args) {
    TableSelectionTest tableselectiontest = new TableSelectionTest();
  }
}

$ source ~/.java14
$ java -version
java version "1.4.2_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_08-b03)
Java HotSpot(TM) Client VM (build 1.4.2_08-b03, mixed mode)
$ javac TableSelectionTest.java
$ java TableSelectionTest

// There is no problem, just exit the application.
// Let's try it with latest 5.0 now

$ source ~/.java15
$ java -version
java version "1.5.0_04"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_04-b05)
Java HotSpot(TM) Server VM (build 1.5.0_04-b05, mixed mode)
$ java TableSelectionTest
table.columCount = 0
table.rowCount = 1
tableModel.columCount = 3
tableModel.rowCount = 1
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
        at java.util.Vector.elementAt(Vector.java:432)
        at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:280)
        at javax.swing.JTable.convertColumnIndexToModel(JTable.java:1761)
        at javax.swing.JTable.getValueAt(JTable.java:1852)
        at TableSelectionTest$1.valueChanged(TableSelectionTest.java:33)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:187)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:214)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:408)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:417)
        at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:510)
        at javax.swing.DefaultListSelectionModel.removeSelectionInterval(DefaultListSelectionModel.java:482)
        at javax.swing.JTable.checkLeadAnchor(JTable.java:2965)
        at javax.swing.JTable.tableChanged(JTable.java:2993)
        at javax.swing.JTable.setModel(JTable.java:2827)
        at TableSelectionTest.<init>(TableSelectionTest.java:46)
        at TableSelectionTest.main(TableSelectionTest.java:53)

// Let's try it with the 5.0 GA:

$ source ~/.java150
$ java -version
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Server VM (build 1.5.0-b64, mixed mode)
$ java TableSelectionTest
table.columCount = 0
table.rowCount = 1
tableModel.columCount = 3
tableModel.rowCount = 1
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
        at java.util.Vector.elementAt(Vector.java:432)
        at javax.swing.table.DefaultTableColumnModel.getColumn(DefaultTableColumnModel.java:280)
        at javax.swing.JTable.convertColumnIndexToModel(JTable.java:1761)
        at javax.swing.JTable.getValueAt(JTable.java:1852)
        at TableSelectionTest$1.valueChanged(TableSelectionTest.java:33)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:187)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:214)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:408)
        at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:417)
        at javax.swing.DefaultListSelectionModel.removeSelectionIntervalImpl(DefaultListSelectionModel.java:510)
        at javax.swing.DefaultListSelectionModel.removeSelectionInterval(DefaultListSelectionModel.java:482)
        at javax.swing.JTable.checkLeadAnchor(JTable.java:2965)
        at javax.swing.JTable.tableChanged(JTable.java:2993)
        at javax.swing.JTable.setModel(JTable.java:2827)
        at TableSelectionTest.<init>(TableSelectionTest.java:46)
        at TableSelectionTest.main(TableSelectionTest.java:53)

=> It is the GA release which introduces the problem.