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 Tested Window title : Palette Manager
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Results of Accessibility test

 Components with no LABEL_FOR pointing to it :
   Class: org.openide.explorer.view.TreeView$ExplorerTree {  Palette Contents Tree |
Palette categories and items displayed as a tree }


 Components with no mnemonic :
   Class: javax.swing.JButton {  Add From Project... |  }



Please add the mnemonic and set the LABEL_FOR of "Palette Content" to the
TreeView. There is even mnemonic of "Palette Content" but it points to nowhere ;)