A me non capita. Aggiungi \listfiles prima di \documentclass e riporta il risultato: capirai subito quale. Così si possono controllare le versioni dei vari pacchetti.
Ciao
Ecco qua:
`*File List*
toptesi.cls 2006/04/04 v.4.00.02 Class for typesetting university theses
report.cls 2005/09/16 v1.4f Standard LaTeX document class
size12.clo 2005/09/16 v1.4f Standard LaTeX file (size option)
babel.sty 2005/05/21 v3.8g The Babel package
bblopts.cfg 2006/07/31 v1.0 MiKTeX 'babel' configuration
english.ldf 2005/03/30 v3.3o English support from the babel system
italian.ldf 2005/02/05 v1.2q Italian support from the babel system
toptesi.sty 2006/08/22 v.4.00.03 Extension for toptesi.cls
graphicx.sty 1999/02/16 v1.0f Enhanced LaTeX Graphics (DPC,SPQR)
keyval.sty 1999/03/16 v1.13 key=value parser (DPC)
graphics.sty 2006/02/20 v1.0o Standard LaTeX Graphics (DPC,SPQR)
trig.sty 1999/03/16 v1.09 sin cos tan (DPC)
graphics.cfg 2005/12/29 v1.2 MiKTeX 'graphics' configuration
dvips.def 1999/02/16 v3.0i Driver-dependant file (DPC,SPQR)
topfront.sty 2006/09/04 v.4.00.04 Title page for TOPtesi
toptesi.cfg
topcoman.sty 2006/12/15 v.4.01 Additional commands for the TOPtesi bundle
inputenc.sty 2006/05/05 v1.1b Input encoding file
ansinew.def 2006/05/05 v1.1b Input encoding file
amsmath.sty 2000/07/18 v2.13 AMS math features
amstext.sty 2000/06/29 v2.01
amsgen.sty 1999/11/30 v2.0
amsbsy.sty 1999/11/29 v1.2d
amsopn.sty 1999/12/14 v2.01 operator names
syntonly.sty 1999/09/17 v2.1e Standard LaTeX2e package
verbatim.sty 2003/08/22 v1.5q LaTeX2e package for verbatim enhancements
longtable.sty 2004/02/01 v4.11 Multi-page Table package (DPC)
caption.sty 2007/04/16 v3.0q Customising captions (AR)
caption3.sty 2007/04/11 v3.0q caption3 kernel (AR)
float.sty 2001/11/08 v1.3d Float enhancements (AL)
xcolor.sty 2007/01/21 v2.11 LaTeX color extensions (UK)
color.cfg 2005/12/29 v1.1 MiKTeX 'color' configuration
framed.sty 2003/07/21 v 0.8a: framed or shaded text with page breaks
lgrcmr.fd 2001/01/30 v2.2e Greek Computer Modern
***********`Grazie per l’aiuto…
A me non dà errori. Controlla il file:
`\listfiles
\documentclass[12pt,a4paper,draft]{toptesi}
\usepackage[ansinew]{inputenc}
\usepackage{graphicx}
\usepackage[italian]{babel}
\usepackage{amsmath}
\usepackage{syntonly}
{\obeyspaces\global\let =\space}
\usepackage{verbatim}
\usepackage{longtable}
\usepackage[font=normalsize]{caption}
\usepackage{float}
%\usepackage[colorlinks=true, linkcolor=black, citecolor=black, urlcolor=black]{hyperref}
\usepackage{xcolor,framed}
\definecolor{shadecolor}{gray}{0.9}
\renewenvironment{comment}{\begin{shaded}}{\end{shaded}}
\raggedbottom
\italiano
\begin{document}
Questo non è commentato
\begin{comment}
Questo dovrebbe esserlo
\end{comment}
E questo nuovamente no.
\end{document}`
Di più non so dirti.
Ciao
Enrico