Over a year ago, we announced we were deprecating the legacy REST API to focus our efforts on the Graph API. Moving forward, any newly created apps will not be able to use the REST API. This means that calls to the REST endpoints from apps that have a created date later than April 10, 2013 will receive error code 3, unknown method.
This change does not break existing apps with dependencies on the REST API. Any apps that were created before today will continue to work with the REST API, but we highly encourage all developers to migrate to the Graph API as soon as possible.
The following stats are for activity between 04/03/2013-04/10/2013: