No I haven't checked it. But it is fairly new.
I just wanted to know if Calibre should have a copy of every book in a library rather than just a link. I got my answer: it should.
That's the point: 'should'. But it looks like it can happen that it doesn't so my take home lesson from all this is to check the library as soon as I've created it. And, I guess, every time I add to it.
I'll settle for that.
p.s.
Is it normal for 'fix' to be marked 'not responding' while the blue circle continues? That means it is working or it means it isn't and we should shut it down?
I mean this:
https://imgur.com/RZETWdh