groundFungus:
Well, that was my best shot. I can see no other explanation.
I ran out of ideas myself, hence the thread. I'm hoping fmalpartida is still around and will chime in.
I have one thing to try, but I am not optimistic (and can't try until I'm at home with my stuff) as I think it only applies to the parallel displays (as I recall there is some sort of name conflict with the Arduino IDE and fmalpartida's library).