big format for Notation Manual: unsupported compression type

[Frédéric Bron]

2.13.54

There is an issue with Notation Manual in big format:
http://lilypond.org/doc/v2.13/Documentation/notation-big-page.html

when clicking on an item of the table of contents (with firefox 3.6.15
on Windows), I get an error message:
"Erreur d'encodage de contenu. La page que vous essayez de voir ne
peut être affichée car elle utilise un type de compression invalide ou
non pris en charge."

If I try to translate, it could give:
"Content encoding error. The page you try to see cannot be displayed
because it uses an invalid or unsupported compression type"

Frédéric