I think it had been flashing even before I had put any money in. Well, I had tried to feed the meter.
Came back from meeting and found a @!*@!@ parking ticket on the windshield.
Parking meter was now flashing "METER EXPIRED"
Dogoneit! It's a $30 ticket. I'm thinking about filing an administrative claim against it. I don't know if it's going to get me anywhere, but it's the principle of the thing.