the mad fermentationist has this to say
"A pellicle is a sign that there is oxygen in the head-space more than anything else. I have had fantastically sour/funky beers that never grew more than a light skin, and terrible beers that grew huge pellicles because too much oxygen was getting in. In general it is not something I would worry about too much either way (unless you are trying to brew a clean beer)."
Kegged and serving -Rye IPA, Kohatu Pale Ale, Brown Forge, Marilla Wheat
Bottled: Too many to list
Fermenting: Flanders Red, Solera Lambic, Sour Rye Solera, Consecration, Apfelwein, Apple Cider, Nelson Saison, Sage Saison, Farmhouse Brett Saison, Little Bo Pils, It's a Celebration Bitches