actually it was the other way around, we have to tell ruby that it's utf8,...

actually it was the other way around, we have to tell ruby that it's utf8, though now the build fails because (first guess) \w probably doesn't include utf8 chars in 1.9

spec/shared_behaviors/taggable.rb

+# coding: utf-8
 #   Copyright (c) 2010, Diaspora Inc.  This file is
 #   licensed under the Affero General Public License version 3 or later.  See
 #   the COPYRIGHT file.