Comment 4 for bug 349463

I have been informed by "Randy White" that the embedded image is the culprit. he found the information on a Russian site. http://www.gentoo.ru/node/17774
(Afraid I don't speak Russian)

I did as he suggested an used Easytag to remove the embedded pictures. Bingo, the ogg file now plays. This isn't a great work around as it would need done for every podcast that gets downloaded that contains pictures.

So the problem would seem to be mplayer not supporting the picture tag properly. Hope this helps someone create a fix.