Sam Ruby: Possibly as early as October, and certainly no later than the end of the year, these warnings will be converted over to errors.
The time has arrived. Where there previously was only a general warning, you now get specific, element by element, and attribute by attribute indication of what needs to change to make your Atom feeds conform to RFC 4287. You may also find this to be helpful.
The goal remains to make Atom 0.3 irrelevant by the time Windows
Longhorn Vista is generally available. Which according to
reliable and always authoritative Wikipedia is September