Ha! Yes it works!
I might try to delete some of the extra bins that seem to have appeared since the update - just to clear things up, and make things look normal again - possibly doing a (long, drawn-out) back-up in between.
I had the laptop suddenly shut down, with a warning message, a couple of hours ago.
When it had re-booted, ther was the option to send a report to Apple.
I'm feeling quite relieved, now - and had assumed that this was another manifestation of the Mail problem, as I'd been "messing around" in mail, only a couple of minutes beforehand, in an attempt to get things back to "normal"!
I may yet stick this on that other thread that I linked to on here, a couple of days ago - but I'll be sure to make sure they know it wasn't actually me that found it!
You both appear to have a decent, solid methodolgy behind your solving solutions - and in contrast, I generally poke around hoping for the best!
How I suddenly have lots of "points" against my "level 1" status here, I'll never know!
Consolation for seeming so challenged & backward in my cartoon-style diagnostic procedures, or raising the most laughs at Apple Central, is all I can think of!
I know it's minor in the grand scheme of things - but it feels like a Eureka moment, to me - so, a heart-felt thanks - to both of you!