I'm getting a false positive on this highlighting rule, based on the "Album Complete? is not Y" rule (with or without the sub-rule):
If I remove "Album Complete?" then the highlight goes away. (And yes, I've checked that all tracks show Y for that field.) It's only this album, though.
Update: I went in with the tag inspector and discovered that even though all tracks showed Y, there were two dates on different tracks. When I removed one of them, the problem went away (even though then, some tracks had a date and some didn't). Somehow multiple dates were causing the issue, even though it wasn't affecting the value for "Album Complete?". Strange.
Further update: After more testing, triggering this bug seems to require that some files have multiple TDRC values AND that there be no single, consistent TDRC among all the files.