Well, I was wrong on this one. Here's a final-final postscript on this saga. But first, retiring when I did has been one of the smartest decisions I've made.
In another post, I mentioned that I did an exit interview with the top boss (not my boss's boss). I put her on notice that the next year-end audit would be telling, going as far to say that there was no way my boss could handle it without a lot of outside help.
Fast forward a year later. My former boss resigned. He's "retiring" at the end of January, which is a far cry from his statement of working another 5-10 years. Apparently, the audit did him in and he was asked to resign. It's nice to know that all of us who left the division have been vindicated by this (i.e., it wasn't us who were the problem(s)).