FULL PRODUCT VERSION :
java version "1.6.0_07"
Java(TM) SE Runtime Environment (build 1.6.0_07-b06)
Java HotSpot(TM) Client VM (build 10.0-b23, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows XP, Windows Vista

A DESCRIPTION OF THE PROBLEM :
DefaultTreeModel.nodeStructureChanged(treeNode) unselect the selected node when the root node is selected. If another node is selected, the selection is not changed.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Select the root node
2. Press some button which to call DefaultTreeModel.nodeStructureChanged(TreeNode);

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The selection to be not changed
ACTUAL -
The selection is unselected

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
    TreePath path = tree.getSelectionPath();
    if(path != null)
    {
        TreeNode node = (TreeNode)path.getLastPathComponent();
        ((DefaultTreeModel)tree.getModel()).nodeStructureChanged(node);
    }

---------- END SOURCE ----------