Current text:
RSS feeds provided by LiveJournal at the URLs above are RSS version 2.0.
Suggest:
RSS feeds provided by LiveJournal at the URLs above are RSS version 2.0.
Atom feeds provided by LiveJournal at the URLs above are Atom version 0.3.
(Kept them separate for clarity, but could equally combine it all into 1 sentence I guess)
EDIT: The 03 spec is actually the 4th IETC spec but ... didacticism vs actually being understandable. ;)