Smart playlists / videos without ratings not working in Krypton

Was using Jarvis and had several smart playlists for videos set up with a rule ‘rating < 1’ which would pull in all the videos that I had not rated. Having upgraded to Krypton, when I load one of these playlists it shows no videos (I have many, many videos with no ratings, so that’s not the issue). I tried creating another playlist that said ‘rating is not’ 1-10 (I rate all my videos as integers and created 10 different rules for this playlist), but this didn’t work either – still no videos listed.

Seems like this may have been a bug introduced in Krypton.

Any help would be appreciated.