We use a company that manages all current & new podcast/feeds to the app’s database, see forum post “Subject: Adding Podcast/Feeds to DoggCatcher Database” http://www.doggcatcher.com/node/6883
So we are unable to correct incorrect or broken feed/podcast URL’s when using the "Search" feature, the next option is to subscribe to the feed/podcast manually (See above forum post Subject: Adding Podcast/Feeds to DoggCatcher Database” under “Subscribe to the feed/podcast manually”)
Check the Radio France Internationale podcast website
http://www.rfi.fr/fr/podcasts/ for feed/podcast URL’s
example “Journal en français facile “
http://www.rfi.fr/fr/podcasts/journal-fran%C3%A7ais-facile/podcast