I have a problem with my iPod nano 2G (8 Gb black). It seems that it jumps to the next track in the middle of tracks. This happens in a reproducible way for maybe half of my tracks and always at the same point. For instance, for track X (length: 5 minutes), it will consider it finished after 1minute 12seconds whenever I play it. It reads the length of the track correctly, and still say that 3 min 48 secons remain after 1 min 12 sec, but still it will jump to the next one... This way, I have a 45 minutes series of tracks played in.... 12 minutes. The files were mp3 encoded (into AAC, I think ?) by itunes. What may cause this ? How to fix this issue ?