The TechZone has posted DVD Insider - Next Gen Copy Protection. Here's a quote.
Reviewers said the sequel – Dead Man's Chest – would be a bomb. It racked up record ticket sales in its first 10 days … $258.2 million. MPAA said pirates stole more than $70 million from them in the same period. Their solution -- put the biggest, baddest safe around their treasures imaginable with double, nay triple locks to keep the low-lifes out.