A thread about Dungeon crawl eh? Maybe you meant: https://news.ycombinator.com/item?id=28217897

No, that's what I meant to link. Melee damage was accidentally doubled for 2 whole weeks and not and nobody noticed. Those players play extremely close attention to stats and such.

The post goes on to talk about how and why many changes and behaviours can go unnoticed, and I think the whole episode disproves the parent posters initial point.