jmtorres | brevity is the soul of coherently displayed text

So if you're using a custom footer on cross-posts, you should limit it to 256 characters. At present, the manage account settings will let you save one longer than that, and even remember it for a couple of hours--but after that it will truncate your footer to that length. It has already been logged on Bugzilla so hopefully it'll be fixed soon, but right now, the answer to the hair-tearing "why did my comment link break" question is "because the custom footer can only be 256 characters long, but the site forgot to tell me."