More efficiently handling 404s, which as many have pointed out we were handling quite naïvely.
Many times I've seen someone on HN write a negative/flaming reply to a comment, which then nets a bunch of further agreement and consensus, and the original commentator is nowhere to be seen.
You quickly responded and fully acknowledged the faux pas (nuking any negative consensus), then you replied twice more, and one of those replies was to a request for technical info.
/o/