TreeNodesChanged only called when root changes

Hi all, just a quick one,
I have a JTree and TreeModel setup, and set up a tree model listener as follows:
public void treeNodesChanged(TreeModelEvent treeModelEvent) {
// The user has changed the name of a node
System.out.println("TREENODES CHANGED");
}But this only gets called when the root node is changed. When the other (leaf) nodes are changed (by changed, i mean double-clicking the node and changing the title of it in the tree GUI) everything goes through ok (my model is changed properly with setUserObject ), but treeNodesChanged doesn't get called... :-S
Any hints?

Post a small demo code that is generally compilable, runnable and could reproduce your problem. See: http://homepage1.nifty.com/algafield/sscce.html and/or
http://riters.com/JINX/index.cgi/Suggestions_20for_20Asking_20Questions_20on_20Newsgroups

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TreeNodesChanged only called when root changes

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