I've been experiencing some cases of podcast episodes being stopped and deleted in the middle of playback. I haven't noticed this before today. I've added some new podcasts, but I'm not sure if that's related.
Some examples are episode "Nature Extra: Jeffrey Sachs" from the Nature podcast, and "NYT: Science Times for 4/28/2009" from the Science Times podcast. It's happened during some others this afternoon, but I don't remember which ones. I wasn't paying close attention, as I initially thought it was a fluke (partially downloaded or otherwise corrupt file).
I've sent my logs via email.