Multiple emails to Blogger Support went unanswered. I finally received a form email from Blogger informing me of their collective incompetence:
Thanks for your interest in the new version of Blogger. An error has occurred that has prevented us from switching your account at this time. Our engineers have been notified of the issue, and your blogs and Blogger account should not be affected.Uh, Blogger? My blogs and Blogger account were affected, and I learned that Blogger should not be trusted to provide reliable service.
This is a good reminder to myself that it is time to migrate to a real domain name, and to switch to a platform with actual human support. Any suggestions?