[quote] I have users that have playlists with the same name but in different folders.[/quote]

Hi, by different folders you mean different hierarchy in MM?
i.e. something like
Playlists -> MyPlaylist1
Playlists -> MyPlaylist2 -> MyPlaylist1
?

From what I see such a same named playlists are pointed to the same target path on the device so there currently is not a mechanism to differentiate them.
I will update in mantis: http://www.ventismedia.com/mantis/view.php?id=5814

Is there a concept of any ID for a playlist?

procedure DEVICE_NotifyPlaylist( DeviceHandle : integer; M3UFileName, M3UTitle : PWideChar;
              TrackCount : integer; Tracks : PWideCharArr; M3UPath: PWideChar); stdcall;

Is there any way to identify the playlist in MM which is being sync'd to the device but not by using the name?

The signature looks like ...
[code]procedure DEVICE_NotifyPlaylist( DeviceHandle : integer; M3UFileName, M3UTitle : PWideChar;
TrackCount : integer; Tracks : PWideCharArr; M3UPath: PWideChar); stdcall;
[/code]
Clearly the M3UFileName can identify the playlist name. I have users that have playlists with the same name but in different folders. At present I can differentiate if they have different track lengths.

Any other ideas?