@Run5k & @Biswapriyo, yeah, I lost 115 on SU and 300 networkwide. The claim is that it involved vote fraud, but I'm curious what that definition is. It appears that a lot of high-rep users were affected, and people who I know do high-quality posts, which implies that the votes were likely on worthy posts. If that's the case, what action constitutes vote fraud? If someone follows users they respect and upvote a lot of their posts, is that vote fraud?

Unfortunately we will never know.

I just looked at the top 20 contributors for the year on SU. Only 3 were unaffected. A couple of others lost only minor amounts. But a lot of people took big hits. Several in the ~400 point range (a little bit proportional to total rep). So I don't feel quite so bad. But that means that someone did massive voting to affect that many people to that extent.

@fixer1234 Scripts and automated voting. That's about all we know.