Gah. That should have looked like
However, ID thinks it didn't work, and complains that
The following documents still contain unresolved or modified cross-references:
In the cross-ref panel, you don't get a little red flag anywhere? (Make
sure to scroll all the way up and down.)
Yeah, I do get a red flag on a few of these xrefs. Then I check the source, look at the reported page number, and then check the target. It's correct, every time. So, it's not unresolved, obviously... I wonder what "modified" could possibly mean here?
I don't have a direction here, but are these xrefs linked to paragraphs
or to text anchors?
And what happens when you select the flagged xref and click on update?
Well, I think that maybe I should just live with "fragile."
Xrefs (all point to anchors) that are correct but have a red flag - I can relink those, but update is greyed out.
Some xrefs are genuinely busted - and I can see which ones they are, because I only had incredibly carefully named anchors, and now I have an anchor named, well, "Anchor." Grr. Update and relink are both greyed out.
If I save all docs and close the book, then reopen, I get different unresolved/modified xrefs. Good thing these don't actually need to be live update-able crossreferences, no?
The person who probably knows the most about the problem, at least out of people I know, is Dave Saunders, but I'm not sure he can tell you why things break, just that they do, and he's spent hours rebuilding cross-refs on a couple of major projects.
I get that on valid crossreferences when i cut and paste them from page to page, but not when I drag a frame containing them to a different page.
Well I should say I get that when it doesn't crash indesign entirely.