From: Brian Candler <b.candler@...>
Date: 2010-03-12T00:07:20+09:00
Subject: Re: reading an UTF-8 encoded file

If forcing the encoding of individual strings makes Ruby output them 
differently, then I expect that STDOUT must have an external encoding 
set.

Try this:

   p STDOUT.external_encoding

What do you get? If you get something other than nil, it means that puts 
will transcode characters from the tagged encoding to this encoding.

In ruby 1.9, STDOUT.external_encoding is nil unless you set it 
explicitly.

>> STDOUT.external_encoding
=> nil
>> Encoding.default_external
=> #<Encoding:UTF-8>
>> RUBY_DESCRIPTION
=> "ruby 1.9.2dev (2009-07-18 trunk 24186) [i686-linux]"

Perhaps the version of 1.9.0 which macruby forked from was different in 
this regard though.
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