Should you encounter this problem there are 2 simple solutions:
1. You can edit your podcasts to refresh the cache (e.g. add or delete a word or space).
2. You can change your page theme to a different one, then change it back again.
Also, please do not copy and past contents from Microsoft Word which will automatically add extra codes. You can copy the content to a text or a notepad before pasting them onto your post. This will help.