Our server is on 1.1.0. We upgraded from 0.32 a couple months ago. The day the problem appeared, we had deleted an image that was associated with 50+ computers, though we’ve done no checking to see if they’re related.
There are some notes about steps that I did not need to perform since this guide is from 2007. But kernel compiling hasn’t changed that much theoretically, just the actual syntax of the commands.