Ticking the podcast option when you create your feed selects the Podcast Theme in your Appearance Options. To disable the Podcast Theme or "turn it off", simply select a different them. You can change your feedburner theme by using the following steps: (1) Login to your feedburner account. (2) Click on the title of the feed you want to change. (3) Click the "Optimize" tab. (4) Click the "BrowserFriendly" link on the left sidebar. (5) You will see a drop down menu labeled "Theme:". Click the drop down arrow and select the them you want. (6) Click the "Save" button at the button to apply your selected theme. Hope that helps.