In prior versions of Thunderbird, if I received an email that had multiple recipients I would see a blue star next to each recipient that was already in my address book. If the recipient was not in my address book, then the star outline next to the recipient would not be blue. This made it easy to determine if I needed to update my address book. I just updated to version 91.0 and it does not show this blue star anymore for recipients in my address book. I don't see anything in the release notes to indicate this has changed. Is this a bug or by design? Thanks, Bill