It seems that Apple is getting more picky about Titles and Author tags in Podcast Feeds.
Titles should be just “the title” like – Podcast Help Desk. Not “Podcast Help Desk | The best place to learn to podcast like Dave Jackson and Daniel J. Lewis”
Also, the Author tag should be: Mike Dell Not “Mike Dell, Talking about podcasting like Zig Zigler, Tony Robbins and Pat Flynn talk about business”
In other words, use the tags for what they are for, not for some gray-hat SEO within Apple Podcasts (no longer iTunes)