Arts in the Afternoon: Challenges

Facebook founder Mark Zuckerberg plans to challenge the Children’s Online Privacy Protection Act so that youngsters under 13 can join his social networking site.

Boston Globe film critic Ty Burr writes about something none of the cinema chains are willing to discuss: Many theaters show 2D films using 3D lenses, resulting in movies up to 85 percent darker than they should be. But the average patron, it seems, just doesn’t care how poorly lit the films he sees are.