...on this computer's reset button. Probably on the server's, too.
Huckleberry was rolling around on the floor and somehow managed to hit RESET.
Unlike the OVERLOAD button in diplomacy, the RESET button on a computer is generally not considered a good thing to press without careful review of the situation.
Oh, well... the machine was overdue for a reboot (so's the server; its been pestering me for months to reboot it to complete an update), and I don't appear to have lost any of my work.