At the moment twitter has been showing zero followers and zero following.

We identified and resolved a bug that permitted a user to “force” other users to follow them. We’re now working to rollback all abuse of the bug that took place. Follower/following numbers are currently at 0; we’re aware and this too should shortly be resolved.

Update (10:18 AM PST): Of note: protected updates did not become public as a result of this bug.

MAshable:

Update #1: Many users are also noticing that their following/follower counts have been reset to 0.

Update #2: Twitter says that “follow/unfollow is temporarily offline while we fix a bug.”

Update #3: Twitter has provided the following update to its status blog: “We identified and resolved a bug that permitted a user to “force” other users to follow them. We’re now working to rollback all abuse of the bug that took place. Follower/following numbers are currently at 0; we’re aware and this too should shortly be resolved.”

Update #4: Twitter says that private tweets were not exposed as a result of this bug.