LOS ANGELES, March 5 - Partygoers in elegant evening wear scurried to take their seats at tables decorated with delicate white orchids in the grand hall of the Pacific Design Center here. It was the night before the Academy Awards, and perhaps the last affair that Harvey and Bob Weinstein would throw for the 25-year-old Miramax Films. "No event or person will ever break up the brothers Weinstein," Bob Weinstein declared to the assembled glitterati, dismissing critics, he said, who now believe that the Weinstein era is over. Sitting in somber silence, among the nearly 600 guests, were Leonardo DiCaprio,...