I vaguely remember a discussion about changes which must be made to the
squeak sources file in order for it to work properly under 3.9.  Could
some kind soul forward a pointer to instructions to me.  I can't find it
in the list nor after a brief look through SystemDictionary.

The problem I'm having is that several characters in existing source
code show up as "blocks" (rectangles) so I assume it is a character
encoding problem.

David