I'm new to Calibre and am trying to customize the Associated Press feed to add Nebaska News. This is what I added:
('AP Nebraska News', 'http://hosted.ap.org/lineups/NEBRASKAHEADS.rss'),
This seems to make my Kindle Touch freeze up for a minute or so after returning to the Sections and Articles view when I first click on the Nebraska News Section. Then it finally starts working again.
Other feeds have additional info following rss and I've tried some of those with the same results. I can't figure out what they actually mean, so I don't know if there is something there to fix my problem.