The JScrollpane that the JTree is in scrolls JTree to the left after expanding hiding the root node dot. This occurs with JDK1.1.6 and swing-1.0.2 on Solaris 2.6.

Steps to Reproduce:
0) Run the code below with the configuration above.
1) Note the very first view of the tree.
2) Collapse the tree.
3) Expand the tree.
RESULT: The expanded tree looks different than it orignally did. The scrollpane has scrolled the root's dot to the left and its not visible.

import com.sun.java.swing.*;
import java.awt.*;
import java.awt.event.*;

public class jtreeroot extends JApplet {
        public void init() {
                Container contentPane = getContentPane();
                Object[] objectsForNodes = new Object[] {
                        new JLabel("foo"), "bar"
                };
                JTree tree = new JTree(objectsForNodes);
                JScrollPane scrollPane = new JScrollPane(tree);

                scrollPane.setPreferredSize(new Dimension(150,100));

                tree.setRootVisible(true);

                contentPane.setLayout(new FlowLayout());
                contentPane.add(scrollPane);
        }
}