A DESCRIPTION OF THE REGRESSION :
The movement to the lower direction ends by one time in 6.0 if the right key is pressed when there is focus in the tree.


REPRODUCIBLE TESTCASE OR STEPS TO REPRODUCE:
1.The following sources are executed.
2.Root is clicked with the mouse cursor.
3.The right arrow key to the keyboard is pushed three times.
4.The selection part stops with node1.
5.It is sure to move to node2 normally.

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;

public class JTreeTest {
  public static void main(String[] args) {
    DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
    DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("node1");
    DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("node2");
    
    root.add(node1);
    root.add(node2);
    
    JTree tree = new JTree(root);
    
    JFrame frame = new JFrame("JTree Test");
    frame.getContentPane().add(new JScrollPane(tree));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
  }
}


RELEASE LAST WORKED:
5.0 Update 6

RELEASE TEST FAILS:
mustang-beta

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The selection part moves below in JavaSE5.0.
ACTUAL -
The selection part moves below only once in JavaSE6.0.