@Dang, I once posted a link and then someone reposted the same link but added /# to it. HN treated that as a new URL and that link, because karma -I think- got to the FP. Any solution to that?
We've thought about some form of karma distribution across every user who submitted the link, but that gets complex quickly and I'm not sure it's a good idea. In the meantime, the best approach is to realize that any individual submission is subject to randomness (i.e. /newest is a lottery), and the reliable way to gain karma over time is simply to enter more often, i.e. post more high-quality stories. That's best for the community too!