[ Update 9:28 PST ]
Between 4:00pm and 9:25pm PST today some users were unable to sign in to twitter.
This issue was due to a bug in our front end code, which has been patched.
We apologize for any inconvenience caused by this.
Between 17:25 and 18:05 PST, some users may have experienced issues sending and viewing tweets on twitter.com and twitter’s mobile apps.
The issue has been stabilized and we apologize for any inconvenience.
Between 12:05 and 12:35pm PT, some users may have experienced issues sending and viewing tweets on twitter.com and Twitter’s mobile apps.
The source of this issue has been identified and we apologize for any inconvenience.