Problem with 2d display rendering on Mac

        The display now comes up, but the data is garbage.  I'm trying to
display a matrix of values ranging from 128x128.  In some instances the
first 100 rows are total garbage and the last 28 are displayed with the
correct colors, but the values are messed up.  In other cases the first
100 rows don't show up at all.  It kinda looks like the entire field is
being compressed to the last 28 rows.  Also, the Test61 example spits
out the following error:

                Exception in thread "main" java.lang.NoClassDefFoundError:
        at Test61.setupServerDisplays(
        at TestSkeleton.startThreads(
        at TestSkeleton.<init>(
        at UISkeleton.<init>(
        at Test61.<init>(
        at Test61.main(

which I assume is associated with the Java3d package (which I did not
install on the machine, and as far as I can tell is not available for
the MacOS operating system).