Update: Facebook's coming back online.
Not even two weeks after its worst outage in over four years, Facebook is down once again.
Sometime after 9:30 PM PT, we started noticing issues with our Facebook accounts. So did everybody else. It's unclear whether it's related to the September 23 outage or whether a new issue is plaguing the servers of the world's largest social network. Facebook also had a partial outage on September 22.