This website is now scheduled to undergo periodic maintenance for about 1 hour at 05:00 UTC (about 9PM in California) every 23rd of the month, starting in two days' time.
Apologies for any inconvenience caused by this, but the ability to take a disk image of the website is something I've long wanted to be able to do ...and now we're running in a Linux KVM guest, I can finally do it!