Nodes getting duplicated on tree control

When ever I click on "+" or "-" of a node for expand/collapse on Firefox 1.0.7 (Gecko/20050915) I see the node getting duplicated.
If not activewidgets.com issue please file bug at https://bugzilla.mozilla.org/

steps:
1. start Firefox 1.0.7
2. goto http://www.activewidgets.com/ui.tree/
3. Click "Show example" link
4. click "Show me" button
5. on "home" node click "+"
6. user see "home" expanded along with new "home" node
7. click "-"
8. user see a third "home" node
9. try on other node same prob exist


Also tested on "Gecko/20051008 Firefox/1.6a1" and MS-IE NoProb found.

Yes, this is a bug. AW 2.0 beta1 works in IE only at the moment.

Either am not seeing something or am going blind.

I dont see the bug in either IE or in Firefox 2.0 beta
please confirm

awesome work Alex
waiting for documentation ..

Yes, this problem only happens in Firefox 1.0.x, not in Firefox 1.5 beta2.