Mm... I must have missed that one as only had this thread as unread.
Have some monitoring that detects when a graph fails to be set up, although this had some false positives where people create a graph and delete it very quickly, generating an alert to us, so it's a bit noisy.
A situation where the live graph doesn't have the data, but the historical graph for today does, is definitely some kind of issue.. Annoyingly we don't have a "login as user" function so it's harder for us to troubleshoot this. We're rolling out a change tonight hopefully which will make that feature easy to implement which lets us look into these better (without resetting users' passwords).
seb