Interesting. When using XMLHttpRequest to fetch just HTML files, it's customary to add a sanity check akin to if (XMLHttpRequest.status == 200), but this fails in the case of these wiki pages. I'm aware I can use a different check for these cases since this is a very specific case, such as searching the response for the text "Recent Posts", but still, for the sake of my learning, are you aware of any way I could receive a 200 from those pages?