Hmm, my APC UPS seems to go mad every once in a while. This has happened once already and it happened again tonight: The APC UPS detected a power failure and sent apcupsd the signal to start shutdown. Strange thing is...There was power through out the house. So, for the time being, I am uninstalling apcupsd so that I don't get system shutdowns. Although it would really suck if we had a long power outage and the system did not get shutdown properly.