It might be fixable now -- if it's down to a bogus 'offset' field in the *1 file. Just right click on the offending track, and hit "Reset Metadata". Then hit sync. This'll reset the offset to zero. The next time you download from the player, it'll ask if you want to fix that track. Say yes, and it'll go looking for the MP3 data to update the 'offset' field.

However, if your album art is _too_ big, you'll have to wait for the next beta for this to work correctly.