[XeTeX] error with Polyglossia and \input{} command

[Yves Codet]

Hello.

When I try and typeset the attached "essai.tex" which inputs the  
other file I get this message:

This is XeTeXk, Version 3.141592-2.2-0.997 (Web2C 7.5.6)
  %&-line parsing enabled.
entering extended mode
(./essai.tex
LaTeX2e <2005/12/01>
Polyglossia <v0.2> and hyphenation patterns for english,  
usenglishmax, dumylang
, nohyphenation, arabic, basque, bulgarian, coptic, welsh, czech,  
slovak, germa
n, ngerman, danish, esperanto, spanish, catalan, galician, estonian,  
farsi, fin
nish, french, greek, monogreek, ancientgreek, croatian, hungarian,  
interlingua,
  ibycus, indonesian, icelandic, italian, latin, mongolian, dutch,  
norsk, polish
, portuguese, pinyin, romanian, russian, slovenian, uppersorbian,  
serbian, swed
ish, turkish, ukenglish, ukrainian, sanskrit, loaded.
(/usr/local/texlive/2007/texmf-dist/tex/latex/base/report.cls
Document Class: report 2005/09/16 v1.4f Standard LaTeX document class
(/usr/local/texlive/2007/texmf-dist/tex/latex/base/size12.clo))
(/usr/local/texlive/2007/../texmf-local/tex/xelatex/fontspec/ 
fontspec.sty
(/usr/local/texlive/2007/../texmf-local/tex/generic/ifxetex/ifxetex.sty)
(/usr/local/texlive/2007/texmf-dist/tex/latex/tools/calc.sty)
(/usr/local/texlive/2007/texmf-dist/tex/latex/xkeyval/xkeyval.sty
(/usr/local/texlive/2007/texmf-dist/tex/latex/xkeyval/xkeyval.tex
(/usr/local/texlive/2007/texmf-dist/tex/latex/xkeyval/keyval.tex)))
(/usr/local/texlive/2007/texmf-dist/tex/latex/base/fontenc.sty
(/usr/local/texlive/2007/../texmf-local/tex/xelatex/euenc/eu1enc.def)
(/usr/local/texlive/2007/../texmf-local/tex/xelatex/euenc/lm/eu1lmr.fd))
fontspec.cfg loaded.
(/usr/local/texlive/2007/../texmf-local/tex/xelatex/fontspec/ 
fontspec.cfg))
(/Users/ycodet/Library/texmf/tex/xelatex/polyglossia/polyglossia.sty
(/Users/ycodet/Library/texmf/tex/latex/etoolbox/etoolbox.sty
(/usr/local/texlive/2007/texmf-dist/tex/latex/etex/etex.sty)))
(/Users/ycodet/Library/texmf/tex/xelatex/polyglossia/gloss-french.ldf)
(/Users/ycodet/Library/texmf/tex/xelatex/polyglossia/gloss-greek.ldf
Option: Monotonic Greek
)
Option: Ancient Greek
(./essai.aux)

Package fontspec Warning:
     Adjusting the maths setup (use [no-math] to avoid this).
This warning occured on input line 10.

(./ζαθεος.tex
! Argument of \@sect has an extra }.
<inserted text>
                 \par
l.5 L
      e premier élément de cet adjectif est le préfixe  
intensif éolie...

?
Process aborted

Did I do anything wrong?

Best wishes,

Yves

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