posto il codice che a me sembra funzioni,
`
\documentclass[12pt,twoside,b5paper, openright]{book}
\usepackage[italian]{babel}
\usepackage{fancyhdr}
\usepackage{ibycus4}
\usepackage{needspace}
\usepackage{jurabib}
\usepackage{bibtopic}
\usepackage{ucs}
\usepackage[utf8x]{inputenc}
\usepackage{setspace}
\usepackage{tipa}
\usepackage{longtable}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{multirow}
\usepackage{imakeidx}
\indexsetup{level=\section, toclevel=section, noclearpage}
\providecommand*\see[2]{\emph{\seename} #1}
\providecommand*\seealso[2]{\emph{\alsoname} #1}
\providecommand*\seename{vedi}
\providecommand*\alsoname{vedi anche}
\newcommand{\nn}[1]{#1n}
\pagestyle{fancy}
\renewcommand{\chaptermark}[1]{\markboth{\thechapter.\ #1}{}}
\renewcommand{\sectionmark}[1]{\markright{\thesection.\ #1}}
\clearpage{\pagestyle{empty}\cleardoublepage}
\let\origdoublepage\cleardoublepage
\newcommand{\clearemptydoublepage}{%
\clearpage
{\pagestyle{empty}\origdoublepage}%
}
\let\cleardoublepage\clearemptydoublepage
\usepackage[pdftex]{hyperref}
\makeindex[title=Indice dei nomi e delle cose notevoli, columns=2]
\makeindex[name=latino, title=Indice dei termini latini, columns=2]
\makeindex[name=altre, title=Altre lingue indoeuropee, columns=2]
\makeindex[name=AutoriA, title=Indice degli autori antichi, columns=2]
\makeindex[name=autori, title=Indice degli autori citati, columns=2]
\begin{document}
\hyphenation{ra-tio-nem Leon-hard Bergk e-di-tio ri-pro-du-zio-ne}
\frontmatter
\setstretch{1}
\include{title1}
\cleardoublepage
\include{dedica}
\setcounter{secnumdepth}{-1}
\setcounter{tocdepth}{5}
\setstretch{1}
\cleardoublepage
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{#1}{}}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CE,CO]{\nouppercase{\leftmark}}
\tableofcontents
\listoffigures
\listoftables
\setlength{\parindent}{0.5cm}
\mainmatter
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{#1}{}}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CE,CO]{\leftmark}
\include{Premessa}
\setcounter{secnumdepth}{2}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CO]{\nouppercase{\rightmark}}
\fancyhead[CE]{\nouppercase{\leftmark}}
\include{Carmen}
\include{Storia_CS}
\include{Status_CS}
\include{Edizione_CS}
\include{Lingua_CS}
\setcounter{secnumdepth}{-1}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
%\renewcommand{\sectionmark}[1]{\markright{#1}{}}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CE,CO]{\nouppercase{\leftmark}}
\include{Conclusioni}
\setstretch{1}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{#1}{}}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CO]{\nouppercase{\rightmark}}
\fancyhead[CE]{Le fonti classiche}
\include{Appendice}
\setcounter{secnumdepth}{1}
%\setstretch{1}
\setcounter{secnumdepth}{-1}
\bibliographystyle{jurabib}
\nocite{*}
\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
\renewcommand{\sectionmark}[1]{\markright{#1}{}}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CE]{\nouppercase{\rightmark}}
\fancyhead[CO]{\nouppercase{\leftmark}}
\chapter{Riferimenti bibliografici}
\begin{btSect}{bibliouno}
\section{Fonti classiche}
\btPrintAll
\end{btSect}
\begin{btSect}{bibliocinque}
\section{Fonti classiche in traduzione}
\btPrintAll
\end{btSect}
\begin{btSect}{bibliodue}
\section{Edizioni del \emph{De Lingua Latina} di Varrone}
\btPrintAll
\end{btSect}
\begin{btSect}{bibliotre}
\section{Edizioni del \emph{De Orthographia} di Terenzio Scauro}
\btPrintAll
\end{btSect}
\begin{btSect}{biblioquattro}
\section{Edizioni del \emph{De verborum significatione} di Festo}
\btPrintAll
\end{btSect}
\begin{btSect}{Kbib_CS}
\section{Altra bibliografia}
\btPrintAll
\end{btSect}
\index[autori]{prova}
\index[AutoriA]{prova}
\index[altre]{prova}
\index{prova}
\chapter{Indici}
\fancyhf{}
\fancyhead[LE,RO]{\thepage}
\fancyhead[CE]{\nouppercase{\rightmark}}
\fancyhead[CO]{\nouppercase{\leftmark}}
\cleardoublepage
\printindex
\newpage
\newpage
\newpage
\cleardoublepage
\printindex[AutoriA]
\newpage
\cleardoublepage
\printindex[autori]
\cleardoublepage
\printindex[altre]
\end{document}
`
se a te non da il risultato non uguale al mio
mi viene il dubbio che non hai i pacchetti aggiornati
che distribuzione usi?
ciao