An infrequent user of Firefox’s feature for subscribing to feeds.
... then you might find it useful to register the FeedValidator as a “Feed Reader”.
OK, that works nicely. I have to say, I was initially confused by the direction to “follow the instructions at the top of this page.” I looked on the HTML page itself, and the feedvalidator.org documentation, for such instructions, before realizing that firefox had been nudging me with one of its little popdowns to register the feed reader.
I like the concept, though, of utilizing the pluggable feed reader in this way. It makes validation much simpler.
Aristotle: my experience was that such links would fail due to some check ensuring that the source of the link matched what was being registered. As such, I simply added some surrounding HTML and committed the result to SVN.