Yes, caves.org was down part of Monday, then back up, then back down, now back up...
Errr, let's call it human error. Basically, I've got the security on the website locked down so tight that it was causing problems for some of the grotto webmasters who have some nice PHP scripts. In trying to loosen things up enough for them, I inadvertently broke something else.
Sorry for the downtime. I think all is well now. Of course, if anything looks broken, feel free to email me at admin [at] caves [dot] org.
I can't explain the possible content change of the caves.org index. I'm just the guy behind the curtain. I try to stay away from being responsible for the content of the pages. I'll ask the webmaster [at] caves [dot] org (not me) if he knows anything.