Jonathon Delacour: “I noticed that Phil Ringnalda had added the (blue and white) RDF button to his weblog, presumably to differentiate his RDF feed from his RSS feed (which uses the traditional orange and white XML button). Once I’d created the ESF button for Nicholas Avenell, I made an RSS2 button. However, Dave Winer stated quite definitely that RSS feeds (including RSS 2.0) should use the XML button. Since he hasn’t, as far as I’m aware, objected to Phil’s RDF button, it seems clear that Dave’s concern is that any RSS feed uses the XML button. […] *all* RSS feeds are supposed to use the XML button and other XML-based feeds can have a separate button with the name of the format.”
Thanks Jonathon! 
Peter Van Dijck 
Bloddy stupid and shortsighted using a button that says “XML” for RSS data.
At least Mark Pilgrim realised this error early with his RSS auto-discovery LINK tag:
Given that there may be many alternative/additional feeds for a given page, all expressed in XML, but using different formats (RSS, XFML, RDF, XTM, etc), insisting on grabbing the “XML” tag for just one format seems a tad arrogant.
Yes, that’s what I thought. I wonder what he (Dave) is thinking?