Did you upload a file for that particular episode and then delete and upload a different file in its place? That might've caused the problem.
And yes, in the future if this happens again, do this:
1.) Log into your Blubrry Podcaster Dashboard.
2.) Click the Manage Episodes link in the Podcast Hosting box.
3.) Click the red X next to the episode listing for the episode with the busted player. Confirm the deletion acknowledgements that come up.
4.) Go back to the Podcaster Dashboard and click the More Directory Options link inside the Directory Listing box.
5.) Click the Refresh Directory Listing link. This will automatically ping your source feed and refresh the episodes in your account based on what's in the feed and should fix any issues with the embeddable media player.