I just noticed that "friend finder, friend add" has not been working since the twitter suspension. There are about 3500 friend requests queued up to process.
I've fixed the bug, and I've also had to slow down the "friend add" script so it doesn't add too many friends for anyone in one go. It's also worth noting that no one's friend requests have been lost, they will be acted on.
It will take about 2 days to clear down the backlog of friend add requests and then things should be working as normal.
Un-follow is working, and un affected.