Add custom feed to Wordpress: add_feed or do_feed

Question

I have an existing custom feed using do_feed_* but I see there is an undocumented (and existing since 2.1) *_add_feed. Is one better than the other?

I have do_feed_* working but since I upgraded to 3.0 last week, any URL with "&author=" in it redirects to the root site page. Take it out and it loads the page fine (but of course does not show the proper author). So, as I investigate, I wonder if *_add_feed might be better?

Answer 1

Relying on an undocumented method in any API is more dangerous than figuring out how to properly use a documented method.