As an ongoing thing I always see a few 404's for "index.rdf" in the logs. I've never paid much attention - that part of my system logs is a cesspool of various probes to see if some sort of botnet exploit thingie is on my system. I just assumed that index.rdf was one of those.
(And for all of you saying "But I've been using a RSS feed for a long time now" - the sidebar links on the right that said "Syndicate" pointed at the right file. This would be if you had some application that directly read the metadata from the header.)
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