I don't know, FNH; we haven't been getting any reports like that.
What exactly is happening when you try to play a Pseudopod episode? I.e., what error do you see or hear? Does it happen at the beginning, the end, or at some point in the middle? What MP3 player are you using? Can you point us to one or more episodes that consistently break it, and one or more that consistently work?
If you can supply more details, I'll investigate and try to get to the bottom of it.