No, still getting that message and I wonder if it has something to do with the import of my classic files. I found one post about that message here but do not want to chance corrupting my test site by editing any files: "[7.4] RSS Feeds Not Working, Can't Create New Ones" where editing a file was recommended by blaaskaak in this way:
Code
<input type="hidden" name="feed" value="$feed" />
 change to <input type="hidden" name="valid_post" value="1" /> in /templates/default/admin/edit_multi_rss.tmpl