Apparently, when HA moved servers Friday night, the old server was never shut down. Thus, as the new IP propagated through the various DNS servers over the next day, some of you continued to see the old site, while others (like me) were taken to the new site. Some of you may have seen comments, and at least one post, disappear. To which I say: oops.
Everything should be operating normally now. (Normal, by HA standards, anyway.) If not, let me know.