Some tweeps may have faced a bit of a surprise when they logged into their accounts yesterday, after Twitter had to clear users' follower lists to fix a bug.
The bug allowed users to force other people to follow them, by typing "accept" @ Twitter name: eg. "accept @50 cent"
The method was retweeted around the site, creating a headache for Twitter engineers.
A large number of people reportedly used the hack to force celebrities to follow them.
The bug raised security concerns as spammers could gain access into tweeting messages into thousands of accounts.
It also gave users the ability to view their followers' live chats and see their pending friend requests.
To correct the problem, Twitter had to reset Twitter user follower numbers to zero for a couple of hours.
“We identified and resolved a bug that permitted a user to ‘force’ other users to follow them,” Twitter said in a blog post.
“We’re now working to rollback all abuse of the bug that took place.”
While Twitter hasn't confirmed how many accounts were affected by the bug, it did say that private updates were not made available to all who took advantage of the hack.
Despite follower numbers appearing to hit rock bottom, Twitter users were still able to use the site during the disruption.
Did you make use of the "accept" bug? Leave us a comment and let us know.