When I’ve updated a goal using either Beeminder or the Beeminder Bot email, it adds a checkmark in front of the goal title on my goals page. This indicates that I’ve updated that goal today. I like it.
If I update it using the Quick Add on my goals page, no checkmark is added. 
It’s just a nit since the data is actually processed and the graph is actually updated.
This is similar to, but a little different than, an earlier bug which apparently was fixed: