rss feed custom content type

Hi all. I was showing a friend the views module on a site and I seem to have messed things up to a point where I haven't been able to recreate the view. The error I'm getting is:

Fatal error: Cannot access empty property in /home/content/40/4818240/html/sites/all/modules/ffpc/ffpc_plugin_row_podcast.inc on line 86

Oddly enough, a similar view that acts on the same data does not generate the error (OGG feed) (MP3 feed is broke).

Any ideas?