If you use their API and haven't seen it yet, their issue is listed here on their status page:
https://developers.facebook.com/status/issues/55989644784543...
https://developers.facebook.com/status/issues/55989644784543...
Current State: Investigating
Description: We are currently experiencing issues that may cause some API requests to take longer or fail unexpectedly. We are investigating the issue and working on a resolution.
Start Time: 2 hours ago
Last Update: about an hour ago
Updates: There are currently no updates for this issue.
Well someone tell him to stop, for pete's sake!