Just to echo some of the ideas and put some concrete behind them, I have had plenty of experience with scripts (shell, perl) not executing properly on a linux box due to the script originating on a windows platform.

perl -pi.bak -e 's/\r$//'  scriptfile.pl
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$/  =  q#(\w)#  ;  sub  sig { print scalar reverse  join  ' ',  @_  } 
+ sig
map { s$\$/\$/$\$2\$1$g && $_ } split( ' ', ",erckha rlPe erthnoa stJu
+" );
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