Just updated to iTunes 12.5.2 on Sierra and have problem or bug (?): In previous versions of iTunes, it was possible to delete songs from the library from a Smart Playlist. All I had to do was select the song in the playlist and press Alt-Del. iTunes would ask for confirmation and then delete the file. Pressing the same combination in a Smart Playlist in iTunes 12.5.2 does nothing. It does work in the main songs list, but not in the playlist. Checking the menus, I also find a new option in the "Song" menu called "Remove from library," but that is always greyed out in smart playlists and seems to be only available in the main Songs list as well. I do frequent editing of my library based on smart playlists, so this is a significant problem for me. Anyone else experiencing this or - even better - have a solution (I've sent feedback to Apple, but my hopes aren't high)?