WordPress MU

I'm asking here, as well as on the WP forums (where its already vanished out of sight!). Maybe the Gurus here will know the answer!

I'm trying to use xmlrpc_publish_post to intercept posts made by external clients. The Codex is pretty much useless and I've found little of use out there on Google.

I've got

add_action('publish_post', 'wordbook_publish');

which works fine, and I thought that, from what I've read that

add_action('xmlrpc_publish_post', 'wordbook_publish');

would do the same but fire when someone posted in via xmlrpc from an external client. But it doesn't seem to work.

So should it work? Or have I made some fundamental mistake?

It looks like you can't use publish_post and xmlrpc_publish_post to call the same function. If you clone the function but give it a different name it seems to work.