Well, that freeze I had at 9:11 last night decided it wasn't going to be my last. This morning Mozilla crashed twice in a row. Of course, the first time had to be when I had a nice big entry ready to go, but not permanently saved anywhere...I'm not even going to try to re-write it.
I am pretty sure that I have got everything sorted out now, though who can say for sure, as that was the sleepiest tech support I've ever done. While it was down, I wrote down and dated a couple of brief entries, and now that things seem to be back to normal, I've used Movable Type's editing function to make the date reflect when they were actually written, rather than when I was able to enter them. A little unconventional, hence the full disclosure.