DefaultTreeModel.nodeChanged(TreeNode node) did not refress the node

FULL PRODUCT VERSION :
java version "1.6.0"
Java(TM) SE Runtime Environment (build 1.6.0-b105)
Java HotSpot(TM) Server VM (build 1.6.0-b105, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Sun Microsystems Inc. SunOS 5.10

A DESCRIPTION OF THE PROBLEM :
I have a Java Swing Tree, like:
---------------------------------
 mTree = new JTree ();
    CheckBoxTreeCellRenderer renderer = new CheckBoxTreeCellRenderer ();
    mTree.setCellRenderer (renderer);
----------------------------------
 in Java 5 it works fine.
but in Java 6, when when click a father Node's checkbox, the behavior shoud be should it's sub nodes's checkbox should also be selected, but the test result is no.

I think the root cause is in Java SE 6
((DefaultTreeModel)tree.getModel()).nodeChanged(node);
have no effect to current node's upper and sub node. but in Java SE 5, it works so.

.if I manually invoke
 tree.revalidate();
tree.repaint();

it works fine.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. click the check box on father tree node
2. check sub tree node, it should also be selected.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
the select/unselect state of tree node should keep consistence.
ACTUAL -
on the contrary.

REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 5.0u10
The above release value was the last known release where this
bug was not reproducible. Since then there has been a regression.