the question "XeTeX \left and \right problem" (question #30854) won't link from the main page. (i managed to reach it by linking to the OP and then to the question, which did work.) i think there may be unicode symbols in the title (they are certainly present in the text), and that may be part of the problem.
where and/or how should something like this be reported? i considered flagging the question and writing a comment in the hope that a moderator would see it, but the question itself is a reasonable one, and i didn't want to give the impression that something was wrong with the content.
i don't think this this venue is really the correct place to report it either, but after looking through more than 300 meta questions found by a search on "view question" and finding nothing relevant, i took the easy way out. (maybe i'm just not very good at thinking up suitable search terms.)