Well I had the same problem.
I did put the mp3 in the USB port and explored the VOICE mapp. And found that three of my songs were found there. Not only that. By mistake I had succeded to create three wav files there too. I had probably recorded by mistake by pushing the rec button.
So my solution was simply to remove EVERYTHING within the VOICE map. Now my mp3 player doesnt restart after creating the file list.
Good luck.
Kalle, October 2008