OK, WTF is it with HNers today? I downvoted his comment to gray entirely by accident, and knowing that he'd probably wonder who or why, I left a comment.
Seeing a -3 karma for the apology, I thought perhaps readers thought I was being sardonic in my explanation, so I left another comment explaining that it was a 100% genuine reply. Except both my previous comments have been downvoted to hell.
I don't get it. Am I being downvoted for accidentally misclicking the downvote button? Am I being downvoted for admitting I was wrong? Everyone misclicks sometimes, and half of them apologize. I guess HN really is going down the drain.
I think HN is trying to tell you not to apologize publicly for a downvote. It's not that big of a deal and the extra comment distracts from the flow of the conversation.