Many used Twitter to complain on this issue. Facebook spokesman Matt Hicks has said that it was a small percentage of users who had problems accessing Facebook, their friends' profiles or specific site features because of an isolated server problem. On Saturday, at 6 p.m., Facebook said it had restored access to the users, who were having access problems.

Facebook, which has more than 400 million users, has generally avoided such hiccups. Twitter has had bigger problems. Last August, hackers shut down the short messaging service for several hours. Facebook also experienced problems, but it was never shut down completely. The team of IT professionals has started to work on this kind of issues in advance. The giant of social networking has decided to put more efforts, in order to provide its users with much more efficient services.