DID YOU KNOW? 1981’s “Modern Problems” was originally shot as an R-rated raunchy comedy but was heavily edited to receive a PG so as to qualify as a family-friendly Christmas Day release. Some of the naughtier bits – such as Patti D’Arbanville’s multiple orgasm scene, the inflating crotch of a male ballet dancer, and Chevy Chase snorting a pound of white powder and exclaiming, “I Like It!” – still remain in the PG cut. This was the 2nd directorial effort of writer Ken Shapiro, whose only previou