Over at Science Fiction & Fantasy, I answered this question: Why did Voldemort choose a snake as a Horcrux given that it is a living thing and has a limited lifespan? (spoilers for Harry Potter 6/7!). This brought my reputation up to 10,565. However... this upvote didn't show up in the dropdown. Some screenshots:
The dropdown, showing +120 today:
My ?tab=reputation page, showing +130:
My /reputation page, showing the upvote:
Why is it not showing in the dropdown?
This also happened with another answer - the dropdown is exactly the same as before, and yet I gained another 10 rep, and it's showing in all the other places. And on this question - there's no change in the dropdown. And again on SO - I had a suggested edit approved, which gave me +2, and... nothing in the dropdown.