Thanks blaaskaak! I found the fix...
In edit_feeds.tmpl, after:
<input type="hidden" name="returntab" value="$returntab" />
add:
<input type="hidden" name="valid_post" value="1" />
One strange thing I noticed...
I had changed my forums around a little bit after I installed this mod. I renamed a forum and added some. On the edit pages, it is still showing the old way. I'm guessing it's not pulling these from the DB, and from some flat-file somewhere perhaps? :shrug: