Not sure this is a bug, but it is definately a useability issue. If you create a playlist, say "Pearl Jam" and add the album "Ten", then create another playlist, "Music I like", and copy "Ten" into it, if you delete tracks from "Ten" in the "Music I LIke" playlist, they will also be deleted from the original "Pearl Jam->Ten" playlist.

Shouldn't the playlists be separate?!

EDIT ... Oh yeah...this is with Beta13

This is on purpose, by design. Please click here.

That's why I said "not sure if this is a bug, but a useability issue". I disagree with the design choice here...I guess that is what I was trying to get across.

I'd disagree. If you copy the playlist, then you've got a link to the playlist, so that if that playlist changes, it changes everywhere it's referenced. If you want to make a duplicate of the playlist that's separate, you need to create a new playlist that contains the same songs.

Now, it's possible that there's a problem in that there's not an easy way to do that in emplode, especially with nested playlists, but, IIRC, jEmplode has a feature to do exactly that.