I just noticed today for the first time that when I grade an assignment (quiz, upload, etc.), that Speedgrader is not updating the orange icon to a green check mark on the fly. It does update to remove the assignment from the "To Do" list, the grade does stick, and an e-mail notification is generated so it appears that the orange icon is the only thing not updating immediately. If I do leave the assignment and come back to it, the green check mark does appear.
I've submitted a ticket on this and correct me if I'm wrong, but if memory serves me correctly, the icon was changing automatically on the fly once a score (or "update score") was submitted.