From The Scroll K of Denver: Benecol Light and Original

In Important Alerts, Newsletter Items by kosherqu

Benecol Light and Original (formerly O/U pareve), a cholesterol-lowering margarine product, in removing the last 5 grams of trans fat, reformulated the product’s added buttermilk to the mix.  While it is now labeled O/UD (dairy), consumers who have been purchasing the product as pareve for years can easily make the mistake of assuming it is now still pareve.