Comment 5 for bug 2041745

> the pdfs that give errors are the ones that have many hyperlinks or section breaks.

PoDoFo maintainer here: the issue with slow saving should be fixed (possibly included in calibre betas[1]?), but that was not causing PoDoFo exceptions. If even with latest fixes there are other errors related to PoDoFo these should be reported separately.

[1] https://download.calibre-ebook.com/betas/