MB3 v3.0.5896:
I've got a tab I've labeled "Library" and the view is set to the Music library. In the center panel, I've got the Artist column, then to the right is the Album and Tracks column. Under the Album and Tracks column I've got the columns Artwork, Album, Album Rating, Disc - Tracks #, Time, Title, Rating. I've noticed that the Album Rating column entries are displaying for each track (seems odd to be per-track). I can't click any of them to set the album's rating. Highlighting a track shows the faint (unrated) stars for the Album Rating, but nothing happens when I click on any of them. Intentional?
Also a suggestion: Is there any way the Album Rating could be one set of 5 stars placed under either the Artwork or the Album entry? Seems like it would be a more logical placement.