End result: my 240+ day uptime on my primary server has now been reset. This is the 2nd time I've lost high uptime numbers* due to a Liebert UPS. I HATE LIEBERTS.
* - Lest you think it's merely the status symbol of having high uptime that bothers me, it's actually a bit more - remember, I'm running old hardware and I don't like to do a clean reboot. Having them lose power and get it back again scares the crap out of me, as they might not come back up one of these days.