I also found these rolling things... That's normal.Dont worry. And I have a new question, If there are too many 400 errors in nginx, should I ignore them or change somethings? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-mirror/attachments/20121016/7b5a2378/attachment-0006.html>