Hmmm !! ...then I guess its one of those "mysterious incompatibility" situations that arise every now and then among PC users ...damn those PCs !!! ...when you think you've got them set up just right, something like this comes up

That's why I hate it when people refer to PCs as "compatibles" ...not quite compatible now, are they ?
Anyway, thank you Pete, for getting into the trouble to check this problem out

...I'll just use your excellent OpenGL GPU plugin with FF9.
If anyone else happens to experience this same (weird) situation, and manages to find a solution, please remember this thread and by all means post it !!!