The avatar image for a crocheter—as displayed on an index page—links to that crocheter's profile page (e.g. /crocheters/kim). The text name of the crocheter, though, links to, e.g., /crocheters/28. The latter produces a 404.

(This isn't a problem for patterns. Though on the Tips index page, the links on both the thumbnails and corresponding text link to the node/# URL, not the human-readable URL. This isn't a big problem, since the links work, it's just a factor of consistency, though it does lead me to be concerned that the path alias for tips isn't automatically being generated. ETA: This only seems to be the case for the buttonhole tip; I just created a test tip and the URL was generated correctly.)