page:
http://ipg-jets.us.oracle.com/JavaFX/id_common-files/id_common-outgoing/doctest/E17411_01/javafx/2.0/layout/size_align.htm#

look at "Example 2-1 Set a Column of Buttons to the Same Width"
in last line: root.setright(vbButtons);
should be: root.setRight(vbButtons);