Restarts while playing

On my Fuze over the past week when I am listening to a podcast somewhere in the middle it will restart from the beginning. If I fast forward over the restart spot it will continue to play. It has happened serveral times with different podcasts from different websites.  If I play the podcast on my computer it does not have the problem.  So either the problem looks like it is with the fuze.  I am not sure if it is an issue with the file being corrupted when it is copied over or something with the play back.  So far I have only seen this with ogg files.

Any ideas?

 thanks in advance