I use GTmetrix to check my site's page load times. Recently I've noticed that in the timeline, there is a GET undefined (http://*****.com/undefined) that returns a 404 error and takes up 30 seconds or more of time. Everything else loads in 1-2 seconds. Here are the details from GTmetrix: Content-Encoding gzip Vary Accept-Encoding, User-Agent Transfer-Encoding chunked Date Fri, 22 Mar 2013 19:02:10 GMT Server LiteSpeed Connection close X-Powered-By PHP/5.2.17 X-Pingback http://*****.com/xmlrpc.php Content-Type text/html; charset=UTF-8 Expires Wed, 11 Jan 1984 05:00:00 GMT Cache-Control no-cache, must-revalidate, max-age=0 Pragma no-cache [TR="class: netInfoRequestHeadersTitle"] Request Headers [/TR] Host *****.com User-Agent Mozilla/5.0 (X11; Linux i686 on x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.1 Accept image/png,image/*;q=0.8,*/*;q=0.5 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip, deflate Connection keep-alive Referer http://*****.com/ How can I go about figuring out where the problem is? This is all latin to me, and I can't figure out if I'm supposed to be able to identify the issue from what GTmetrix has told me. Any advice would be appreciated.