In addition, I should say that this only happens if we access the server through Apache, and that - in that case - I see that the requests sometimes set the 'n' header (whatever it may be) to 'null':
1. Accept: text/javascript, text/html, application/xml, text/xml, */* 2. Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 3. Accept-Encoding: gzip,deflate,sdch 4. Accept-Language: en-US,en;q=0.8 5. Connection: keep-alive 6. Content-Length: 0 7. Content-type: application/x-www-form-urlencoded; charset=UTF-8 8. Cookie: JSESSIONID.7e848e8e=eb17c51a94f6b5f523e1bde7813bae7b; screenResolution=2560x1440; s_vi=[CS]v1|2787789385310C76-4000010540002DCF[CE]; s_nr=1331622383123; s_vnum=1334214321523%26vn%3D16; last_visit=1332192140381; s_cc=true; s_sq=%5B%5BB%5D%5D 9. Host: ####### 10. Origin: https://####### 11. Referer: https://#######/jenkins/job/PQD_BRANCH/ 12. User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.79 Safari/535.11 13. X-Prototype-Version: 1.5.1.1 14. X-Requested-With: XMLHttpRequest 15. n: null
