Fix bug.

lib/tasks/e_paper_tasks.rake

@@ -21,7 +21,7 @@ namespace :epaper do
 			emails += paper.other_emails_ids
 			emails.uniq!
 			emails_valid = emails.select do |email|
-				tmp = (email_format=~email)
+				tmp = (email_format=~email.to_s)
 				tmp==0 ? true : false
 			end
 			emails_invalid = emails - emails_valid