[scribus] windows to linux charset issue for PDF annotation

[JLuc]

Hello
It's about a scribus created pdf but this is not strictly related to scribus :
A friend on windows has proofread and annotated a scribus PDF document.
When opening it on Ubuntu, some of the notes are OK readable,
but some other are scrambled and some other seem to be cut in the middle of the text.

It could be related to notes having accenctuated or special characters as " or «
because none of the readable notes has such accenctuated characters afaict.
I've tried with Evince and Okular.

Do you have an advice on how to access correctly these notes on linux ?
(Or on how to fix that in the annotation tool on windows ?)

JL