Hey,
AFAIK right now it seems a duplicate is mostly based on two criterias: title and artist.
Tracking duplicates in a playlist makes it impossible to keep different versions of a song within the same albums or even across different albums.
Would it possible to extend the definition for duplicate with more criterias such as duration, album, track number?
(if I missed something and it's already possible to fix my problem, feel free to enlight me ;-)
Eric