In the Explorer, I was cutting and pasting a contiguous set 
of 6 bourne shell (xxx.sh) files from one CVS directory 
(smsi/prod/base/bin/unix) to another 
(smsi/smsihomedir/server/common).  The first move worked 
fine.  Then I tried to cut and paste them back to the 
original directory, and it failed with the exception shown 
below.  Three of the files "disappeared" (are in neither 
directory now).  They actually exist on the filesystem 
(.../bin/unix), but NetBeans doesn't show them in the 
Explorer, even after a "CVS -> Refresh Recursively" (my 
usual trick to put NB and the filesystem back in sync).

Tue Jul 23 14:28:10 CDT 2002: 
java.lang.ArrayIndexOutOfBoundsException: 2 >= 2
java.lang.ArrayIndexOutOfBoundsException: 2 >= 2
        at java.util.Vector.elementAt(Vector.java:417)
        at 
javax.swing.tree.DefaultMutableTreeNode.getChildAt
(DefaultMutableTreeNode.java:231)
        at 
javax.swing.tree.VariableHeightLayoutCache.treeNodesChanged
(VariableHeightLayoutCache.java:374)
        at 
javax.swing.plaf.basic.BasicTreeUI$TreeModelHandler.treeNode
sChanged(BasicTreeUI.java:2344)
        at 
javax.swing.tree.DefaultTreeModel.fireTreeNodesChanged
(DefaultTreeModel.java:440)
        at javax.swing.tree.DefaultTreeModel.nodesChanged
(DefaultTreeModel.java:323)
        at javax.swing.tree.DefaultTreeModel.nodeChanged
(DefaultTreeModel.java:256)
        at 
org.openide.explorer.view.NodeTreeModel$Listener.update
(NodeTreeModel.java:170)
        at org.openide.explorer.view.VisualizerNode.run
(VisualizerNode.java:297)
        at java.awt.event.InvocationEvent.dispatch
(InvocationEvent.java:154)
[catch] at java.awt.EventQueue.dispatchEvent
(EventQueue.java:334)
        at 
java.awt.EventDispatchThread.pumpOneEventForHierarchy
(EventDispatchThread.java:134)
        at 
java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:101)
        at java.awt.EventDispatchThread.pumpEvents
(EventDispatchThread.java:96)
        at java.awt.EventDispatchThread.run
(EventDispatchThread.java:88)