Some iPod Playbacks Don't Complete

Help...A few of the songs loaded on my 5G won't complete playback. If I scan past point where playback stops, i.e., at 11 seconds for one particular song, playback continues to end of song. All songs play fine in iTunes. Have tried the 5Rs. Using iTunes 6.0.5 and iPod updater 2006-06-28.

5G Windows XP