You can cause the same thing to happen to any comment by rapidly clicking the upvote button. This seems to cause the upvote count to drift upward, even though

You can cause the same thing to happen to any comment by rapidly clicking the upvote button. This seems to cause the upvote count to drift upward, even though you would expect it to just oscillate between two values. I've just taken parkermoseyondown's comment from 0 to 40 upvotes. Edit: This seems to be a UI issue. After reloading his comment is sitting at only 1 upvote.