Icon of JTree for top level element looks cut when using SynthLookAndFeel

I have a strange behavior when "plus" image of top level element of JTree is cut in the middle. (This image for all other levels look good)

For example: if I use the following method images look correct:

UIManager.put("Tree.collapsedIcon", IconFactory.getImage("Images/nodeClosed.png"));
 

and it look like this:

If i use "SynthLookAndFeel" it look cut in the middle:

SynthLookAndFeel laf = new SynthLookAndFeel();
 InputStream is = EmsApplet.class.getResourceAsStream("lNf_test.xml");
 laf.load(is , EmsApplet.class);
 UIManager.setLookAndFeel(laf);
 

it look like this:

And here is part of XML file:

<style id="TreeStyle">
     <imageIcon id="treeCollapsedIcon" path="nodeClosed.png"/>
 </style>
 

note: red color is just to mark specific region. please ignore it.

---