TreeGrid node repositioning issue

[phuqit]

Win7x64, Firefox 3.6.13, GWT 2.1.1, SGWT SC_SNAPSHOT-2011-02-03/LGPL Development Only (built 2011-02-03)

    
public void onModuleLoad() {
        final TreeGrid treeGrid = new TreeGrid();
        treeGrid.setWidth(1000);
        treeGrid.setHeight(400);
        treeGrid.setAutoFetchData(true);
        treeGrid.setCanReorderRecords(true);
        treeGrid.setCanAcceptDroppedRecords(true);
        treeGrid.setShowOpenIcons(true);
        treeGrid.setLoadDataOnDemand(false);
        treeGrid.setCanDrop(true);
        treeGrid.setDataSource(RestDataSourceFactory.createCategoryDS());
        treeGrid.setFields(new TreeGridField("_id"),
                new TreeGridField("title", 500)
        );
        treeGrid.draw();
    }
}

It draws the following tree:
-Root
Child1
Child2
Child3

The problem is, that if I try to reposition the Child1 node BELOW Child3, it actually appears ABOVE it. Anyone else seeing this behavior? Incidentally, http://www.smartclient.com/smartgwt/showcase/#tree_interaction_drag_reparent seems to behave correctly.

regards,
Andrius J.