##before
      def store!(file)
        connect!(uploader)
        AWS::S3::S3Object.store(uploader.store_path, file.read, uploader.s3_bucket,
          {:access => uploader.s3_access,
           :content_type => file.content_type}.merge(uploader.s3_headers)
        )
        CarrierWave::Storage::S3::File.new(uploader, uploader.store_path)
      end

##after
      def store!(file)
        connect!(uploader)
        s3_options = {:access => uploader.s3_access, :content_type => file.content_type}
        s3_options.merge!(uploader.s3_headers)
        AWS::S3::S3Object.store(uploader.store_path, file.read, uploader.s3_bucket, s3_options)
        CarrierWave::Storage::S3::File.new(uploader, uploader.store_path)
      end