[cybmole]

I've edited that book now, so I cant easily repeat tests for you, & how would I know which reported page number was correct - except by turning pages from 1 forwards & counting ? The total pages number was always the same ( 1500+ ) but maybe that was pre-computed.

Anyway, here's a new variant.
same feature, different (more popular) books, different bug:
Stephen King's 7 volume Dark Tower series. Each book is split into stanzas, each stanza is split into multiple short chapters. the TOC is at chapter level. but the files structure is one html file per stanza.
so in normal reading you see new chapters start anywhere on a page...

in chapter numbering, the footer works at chapter level, not at stanza level - as soon as you turn to a page that has a new chapter title somewhere on that page, you get that chapter name 1 of x in the footer.
But in book numbering, you are on page x of y and you stay on page x of y all the way through each chapter, then there's a jump, so if I am coming out of a 6 page chapter I see a sudden jump to page x+6 of y.
I've only looked that the book I am currently reading but I think all 7 books in the series have similar coding and structure.

So in this case e have a one to many relationship between html files and toc entries. in my previous epic book example it was the other way around, I had a many ( well 2 actually) to 1 relationship between some html files and a single toc entry.

It just so happened that i had these 2 books and no others on the device when I did the 3.8 to 3.11 upgrade.
I guess there is an outside chance that books added after the Fw upgrade will behave better and that its an effect of the books being indexed by 3.8 fw then viewed in 3.11.

But I'd rather be reading than debugging. I am posting really to see if others can replicate. Maybe when I finish this book I will delete it, reload it, see if it behaves any different...

( I was not intending to even go to 3.11 but my son wants to loan this kobo at the weekend with a view to buying his own one if he likes it, so I figured I should get it fully updated for him, rather than have him do it accidentally from playing with wi-fi options )