init.rb

klass = Paperclip::Storage::Filesystem

klass.module_eval do
  def flush_writes #:nodoc:
    logger.info("[paperclip-hack] Writing files for #{name}")
    @queued_for_write.each do |style, file|
      file.close
      FileUtils.mkdir_p(File.dirname(path(style)))
      logger.info("[paperclip-hack] -> #{path(style)}")
      FileUtils.cp(file.path, path(style))
      FileUtils.rm(file.path)
      FileUtils.chmod(0644, path(style))
    end
    @queued_for_write = {}
  end
end