How does PHP know which feed file (wp-atom.php, wp-rss.php, wp-rss2.php) to use when the permalink (http://blogsite.com/feed/) is used? I ask because I get different results when I look at the /feed/ permalink vs. the wp-rss2.php file. When I put the feed url in the browser they are the same but when I add the feed files to, say, Yahoo, the results are different.
I am using WP 2.0.4 and WP-CACHE, but before I checked I went into the Dashboard and deleted all cache files. Again, checked both feeds (the same) and then checked both set of links on My Yahoo and the most recent story is missing from the /feed/ source but is present in the wp-rss2.php source.