Facebook shut its site last night after prototypes of its redesigned features were accidently leaked to users.
The release of internal prototypes to public users caused Facebook to disable its site for up to half an hour, leaving users to jump ship to Twitter.
In a statement, the social networking giant said: "For a brief period of time, some internal prototypes were accidentally exposed to people externally. As a result, we disabled the site for a few minutes. It's back up, and we apologise for the inconvenience."
The BBC reported a new feature called "memories" shut the site as Facebook rolled out redesigned brand pages, photos section and management feature.
Facebook was unable to provide any further details about the service failure.
Facebook suffered the worst outage in four years in September after technical problems caused a restricted service for two-and-a-half hours.