I get the FastCGI error often too, kevin, but I think chompy knows and is still working on it. It's not even been a week since we changed servers, so there's still plenty of things to experiment with, work out, etc.
For what it's worth, it doesn't appear to be timezone related 'cause I get it morning, midday, afternoon, evening, and late at night, and I am also able to access the site during those same times of day. In fact, just right now I opened three tabs in Firefox for A-O threads, and one of them FastCGI'd but two of them loaded! So I'm definitely of the opinion that it's more of a server or vBulletin code glitch than it is a fault of international traffic. But who knows ... who knows ...