Podcast owners
If you have a podcast published on the iTunes Store, you can update your podcast by changing the data in your RSS feed. See "How to Publish a Podcast on the iTunes Store" to learn about the extended podcasting RSS specification for iTunes, and how to tag data. If you need to block your podcast from iTunes for any reason, you'll find information to do this in the article as well.
Podcast listeners
If you're not the podcast owner but would like to alert Apple about a particular podcast, please use the "Report a Concern" link (located below the Podcast Description) to tell us more about the issue.
