I don't know if that is the case, but if you vote on a post, refresh the page, and it is not up by one, then you are in trouble. Try again, as Hacker News is no

I don't know if that is the case, but if you vote on a post, refresh the page, and it is not up by one, then you are in trouble. Try again, as Hacker News is not eventual consistent, and sometimes it doesn't record upvotes. For comments: you can see if your upvotes are being counted by looking into the user's karma. You can't give lots of karma to one user though. After a few upvotes to a single user, the system will stop recording them. I guess this is a way to prevent karma inflation, and a group of friends cheating themselves into lots of karma.