Using Mezzmo 4.1.3.x on Win7 64bit. I have been trying to make a Smart Playlist using Album Artist as selection criteria. All attempts come up with an empty playlist. Further, if you make a Smart Playlist with some other selection criteria and set the Sort By option in the playlist properties, it kind of sorts correctly. In my test with Sort By set to Artist/Actors Ascending, the first few items in the generated playlist begin with C, not A. Farther down the list there are some items beginning with A after those beginning with B.

Very mysterious to me.....

-- Larry