Well, it seems the server ran out of hard drive space today. This has happened before, but we have never lost data because of it like this. When it ran out of space, it could not save files as it shut down, so some files it started saving were corrupted.
From what I know:
The server forgot all player logins and is giving everyone the starting wooden set again.
Everyone is spawning at spawn.
1 person so far has lost his homes.
-------Feel free to report any other symptoms that affect everyone.
From what I can tell, it seems to have more harshly affected those that were logged in at the time. I deleted some of our older backups to make room. Each are near 9 gigs in size lately so they do take a lot of space. If we don’t change the # of backups, we will have this issue again in a bit over a week.