I posted it on Meta Stack Overflow as well, but in any case: there's a network-wide bug affected all sites' Help Centers. E.g. this link: https://meta.stackexchange.com/help/on-topic shows long-deleted Stack Overflow content only Google can find:
What topics can I ask about here?
a "reticulated spline" is a valid geometrical entity. They're used a lot in terrain modelling. Because you can get non-reticulated splines, someone wiseguy obviously thought it good to start reticulating them.