I can confirm there have been some changes, here is a picture I posted of the /8291 page the day this part of the ARG was found;
If you look now, as Xav quoted above, the missing letters are different in the URL's at the bottom. Perhaps it's imperative that we keep checking the website regularly, and eventually we'll be able to piece together the text from every time it changes.
I also feel the name of the /8291 page (The tons of EDEDEDEDEDEDED's after each other) Is important; it's seems to be too bizarre to mean nothing.
Also, at risk of sounding completely tech-illiterate, which I like to think I'm not, is there any significance to the fact the page ends with .html? Why does need to end like that as opposed to any other webpage. Basically I mean is there anything we can learn about the way it works from that. Probably not though!