From the blog "Tools and Technology"

Heya! April Linden here. Yesterday afternoon (San Francisco time) all of the Place Pages got reset back to their default state. All customizations have been lost. We know this is really frustrating, and I want to explain what happened. A script that our developers use to reset their development databases back to a clean state was accidently run against the production database. It was completely human error. Worse, none of the backups we had of the database actually worked, leaving us u