Jay thanks for quick response and explanations.
Yes, board-switching appears fixed after your last tweak.
The old/new board format explanation makes sense because the impacted boards are the ones I’ve been working in since I switched from beta to stable. Other boards with no activity are fine. No worries about the setbacks, they are fixed easily enough. Just glad the issue was tied to beta since that means your stable users weren’t impacted as I was.
No, I don’t think the reappeared document was from the trash; while I probably have docs with that name in the trash this one is too recent; I haven’t trashed any whole docs in ages as I haven’t been mucking around with my “system” for some time.
I ended up with a total of three “My First Documents”, all of which contained just two parents with one child each.
I guess I’ll fix up my boards and try switching back to beta again, see what happens!