p.s., Re: Weird display problem

[Bill Hibbard <billh@xxxxxxxxxxxxx>]

Here's another print statement to insert, in the toggle()
method of visad/DataRenderer.java:

  DataDisplayLink[] links = getLinks();
  System.out.println("toggle " + on + " " +
    links[0].getThingReference().getName());

This will make sure which DataRenderers are getting toggled
on and off.