Rewards and if I recall it was literally a 1% downvote (yup, just checked).

I don't think you did anything wrong and I also don't think people should necessarily view a downvote as a signal you did anything wrong. As long as votes determine rewards and not just express an opinion, votes are an adjustment of rewards up or down, which is at least as much of a response to other voters (and non-voters) as it is to the post itself.