Redmine

Works for me (see attached file), can you give more details?

You need to change general_csv_encoding from ISO-8859-1 to CP1252 or UTF-8.
source:tags/2.5.1/config/locales/en.yml#L143

$ irb
1.9.3-p545 :001 > s = '’'
 => "’" 
1.9.3-p545 :002 > e = s.encode("ISO-8859-1")
Encoding::UndefinedConversionError: U+2019 from UTF-8 to ISO-8859-1
        from (irb):2:in `encode'
        from (irb):2
        from /home/xxxx/.rvm/rubies/ruby-1.9.3-p545/bin/irb:12:in `<main>'
1.9.3-p545 :003 > e = s.encode("CP1252")
 => "\x92"