@tsoren: ok, that is bizarre. Replacing the ini file did the job but that was the only significant difference between the two. the rest was UI dimensions and recent file references. I cannot see how those can have any effect on Firefly's performance (then again Poser is weird that way...). Maybe the replacing of the ini file forces Poser to re-calibrate other things behind the scenes?

"The fool is not the one that does something foolish, but the one that does nothing at all."