--- attachments_helper.rb	2010-03-25 16:01:05.000000000 +0900
+++ /mnt/base02_data/attachments_helper.rb	2010-03-25 15:57:53.764533400 +0900
@@ -27,17 +27,8 @@
       render :partial => 'attachments/links', :locals => {:attachments => container.attachments, :options => options}
     end
   end
-
+  
   def to_utf8(str)
-    return str if /\A[\r\n\t\x20-\x7e]*\Z/n.match(str) # for us-ascii
-    @encodings ||= Setting.repositories_encodings.split(',').collect(&:strip)
-    @encodings.each do |encoding|
-      begin
-        return Iconv.conv('UTF-8', encoding, str)
-      rescue Iconv::Failure
-        # do nothing here and try the next encoding
-      end
-    end
     str
   end
 end