the character problem in my cygwin manpage

[sun]

my cygwin man pages are mixed with error characters (such as âˆâˆ’c).
this is the result of 'man ls', please help to locate the problem.
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LS(1)                            User Commands                           LS(1)

NAME
       ls �list directory contents

SYNOPSIS
       ls [OPTION]... [FILE]...

DESCRIPTION
       List information about the FILEs (the current directory by
default).  Sort entries alphabetically if none
       of −cftuvSUX nor −−sort.

       Mandatory arguments to long options are mandatory for short options too.

       −a, −−all
              do not ignore entries starting with .