Wow, that took a long time....
In short, somewhere around mid-August I was no longer able to log in to my MT installation. Various troubleshhoting methods were no help. I decided to trash everything, wait until MT 3.2 came out, and start from scratch. I had to imput all the old entires by hand as I had no backup of the Berkeley DB. Sigh.
Someday I'll redo the template and get the site back to having a non-default look, but until then, it is business as usual here.