Twice now I've run into this problem where I get a quota exceeded message and am unable to launch a new instance. The first time, my quota was indeed exceeded, but terminating an instance did not clear the message until I logged out and in again. Today, I hit the same wall except my quota wasn't even exceeded, at least by my reckoning (1/2 instances, 1/2 GB RAM, 1/2 vCPUs); once again, terminating my running instance did not clear the message. Is this a known issue?
This is using Firefox 35.