It seems that double quote and escape is need for non ASCII and backslash on ruby 1.9.2p290 (2011-07-09 revision 32553) [i686-linux]. Contributed by Etienne Massip. git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@6650 e93f8b46-1217-0410-a6f0-8f06a7374b81