UPDATE 3: Problems persisted at 10:30 AM ET. According to TechCrunch, the issues may be due in part of the site’s experimental features, which are currently being tested among small groups of users, who have reported various tweaks to the Facebook Chat sidebar. Read more about these experiments here.
UPDATE 2: Facebook’s issues were largely resolved in the morning on August 11. At 7 AM ET, however, DownRightNow showed intermittent issues on the site, and some on Twitter said they were still unable to log in.
UPDATE 1: At 11:30 PM, a post on Facebook’s Known Issues wall read, “We’re currently experiencing an issue where some users may experience some slowness or timeouts while using the site. This issue should be resolved shortly.”