Currently it seems to work like this:
- show the unread count if there are unread items (e.g. 5)
- otherwise show the total starred count (e.g. 300)
Feature request: Show “5/300” in the above case, showing both unread/total numbers in a very short format.
For me total would be of more value than just unread, but I think showing both would work for everyone, with a minimum of UI intrusion.