Chris

You’re doing something a little more difficult and complicated than what I was doing – I was having the issue where I’d add custom taxonomies, but the archive pages for the tags in those taxonomies would return a 404.

I fixed this by “flushing the permalinks”: just going to Settings/Permalinks and clicking “Save Changes” without making any changes. I learned about that here:

http://seanbehan.com/programming/how-to-flush-your-permalink-structure-in-wordpress-when-using-taxonomies-or-wordpress-taxonomies-not-working-instead-i-see-a-404-page/

Sorry if this doesn’t fix your problem – it sounded slightly similar to mine, so I figured I’d post this.