Completed Realistic 3 a bit ago and finally managed to place what was bugging me about it. I'll try not to give spoilers to anything so please forgive a slightly strained wording (and this is a query regarding the technology, not the mission itself so I figured it belonged here rather than in the mission folder.)
New webpages created through the same method as Basic 8 have a standard file extension. Now, sure, from my reading that's only a default and servers can give their own. But did that mean the little peace poems girl changed it from that default to the one that is actually present (and I've just confirmed that the default file extension throws a 404). Or is there another route for creating ad hoc web pages, different to the one in Basic 8 that has the correct file extension as default - that is to say, the method for creation is different in Realistic 3 and Basic 8? If so, what is it - I like to think my google fu is pretty good but I'm struggling to find it.
Or am I simply overthinking this? I do that sometimes.
Hope this is appropriately located, appropriately unspoilered and comprehensible.
ETA: Or is it simply a matter of the user typing in the file extension in Realistic 3 being effectively the server overriding the default? So had I not typed in the extension the page would have been saved to name_of_page.default_extension while typing in the extension is effectively the mechanism for overriding that default. Hmmm.