However, what would also be great would be to mark playlists with missing files [via (!) sign for example] directly in the playlist window itself, so one sees something is off without in the overview and without looking into the given playlist ?
There's a work around for this of sorts, in case anyone else cares - IF you have your playlists in first level subfolders (under your MB Playlist folder), PlaylistManager will show all tracks of the contained playlists if you select the folder in PlaylistManager, giving a quick overview at least if there's missing bits.
Now if those folders just were collapse-able & nest-able (2nd folder is still displayed as "subFolderName/playlistName" in PlaylistManager and neither first or 2nd level folders are collapse-able as is in latest/21_08 patch version).
Cheers.
c.
ps - as I just saw, the folder-list trick mentioned above only works on files from playlists in the same folder... it will not show files from playlists in subfolders of the selected 1st level folder either...
pps - also, this would be a rather nice-to-have... if I replace a missing file from playlist A (by digging out the file path from elsewhere and point the replace dialogue to said file), and said file is also part of another playlist, the replace action should also be able (upon user pref/dialogue) to replace the missing file in all other playlists where it is missing...