This is probably a problem with the site rather than with squid, but I thought the list might be able to identify it as I cannot. Below is the entire response body. This request works fine without squid in line. Kind Regards, Chris <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML><HEAD><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE>ERROR: The requested URL could not be retrieved</TITLE> <STYLE type="text/css"><!--BODY{background-color:#ffffff;font-family:verdana,sans-serif}PRE{font-family:sans-serif}--></STYLE> </HEAD><BODY> <H1>ERROR</H1> <H2>The requested URL could not be retrieved</H2> <HR noshade size="1px"> <P> While trying to process the request: <PRE> FORM http://www.blueletterbible.org/BibleAJAX/tense.cfm?tense=5723 HTTP/1.0 Host: www.blueletterbible.org User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.8) Gecko/20100214 Ubuntu/9.10 (karmic) Firefox/3.5.8 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-us,en;q=0.5 Accept-Encoding: identity,gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Proxy-Connection: keep-alive Content-Type: application/x-www-form-urlencoded; charset=UTF-8 Referer: http://www.blueletterbible.org/Bible.cfm?b=Eph&c=4&v=28&t=KJV Content-Length: 9 Cookie: CFID=116177544; CFTOKEN=93629362; __utma=136995939.1420754775.1268152974.1268752499.1268767308.3; __utmz=136995939.1268152974.1.1.utmcsr=google|utmccn=(organic)|utmcmd=organic|utmctr=blueletter%20bible; SSTR=%2D1; radio0=0; radio1=0; abbrev=1; quoted=0; sqrbrkt=0; __utmc=136995939; __utmb=136995939.3.10.1268767308 X-Forwarded-For: 192.168.x.x </PRE> <P> The following error was encountered: <UL> <LI> <STRONG> Invalid Request </STRONG> </UL> <P> Some aspect of the HTTP Request is invalid. Possible problems: <UL> <LI>Missing or unknown request method <LI>Missing URL <LI>Missing HTTP Identifier (HTTP/1.0) <LI>Request is too large <LI>Content-Length missing for POST or PUT requests <LI>Illegal character in hostname; underscores are not allowed </UL> <P>Your cache administrator is <A HREF="mailto:bitbucket@xxxxxxxxxxxxxxxxx">bitbucket@xxxxxxxxxxxxxxxxx</A>. <BR clear="all"> <HR noshade size="1px"> <ADDRESS> Generated Tue, 16 Mar 2010 19:22:19 GMT by squid (squid/2.7.STABLE3) </ADDRESS> </BODY></HTML>