The RDA for trans fats is 2 grams. Trans fats are listed on the nutrition facts in grams and amounts less than 0.5 grams are listed as 0 (this is often advertised outside the nutrition facts label). But a serving of food with say 400mg of trans fats is actually a lot (especially if a "serving" is defined as much less than the average person actually consumes). The simple correction would be to list trans fats in milligram units instead as sodium (which has a comparable RDA) and ban the misleading phrase "0g trans fats."
This may seem nit picky but I don't think we should put up misleading numbers in the nutrition facts label.