Hi, I have recently setup a squid proxy on centos 4.5 using the default package which is 2.5.STABLE14. I have some problems with some pages on certain web apps (like monster.co.uk) which result in an Invalid Response error page. When I go through the logs it seems that the web server is returning a blank response header (see below). Unfortunately the web app providers are unresponsive and refuse to make any changes since it is working for the other users. Is there any configuration change/ workaround I can apply to allow my users to access these sites? Here is the error message, please let me know if I should supply any more information. 2007/11/08 14:42:27| ctx: enter level 0: 'http://client.thomasinternational.net/client/Reports_ViewExisting.aspx?~VGVzdFR5cGU9MSY=' 2007/11/08 14:42:27| httpProcessReplyHeader: key '9F7879BB02C18F9C4CD9D7D227286BD6' 2007/11/08 14:42:27| GOT HTTP REPLY HDR: --------- ---------- 2007/11/08 14:42:27| cleaning hdr: 0x8f9e458 owner: 2 2007/11/08 14:42:27| init-ing hdr: 0x8f9e458 owner: 2 2007/11/08 14:42:27| 0x8f9e458 lookup for 38 2007/11/08 14:42:27| 0x8f9e458 lookup for 9 2007/11/08 14:42:27| 0x8f9e458 lookup for 22 2007/11/08 14:42:27| cleaning hdr: 0x8f9e458 owner: 2 2007/11/08 14:42:27| init-ing hdr: 0x8f9e458 owner: 2 2007/11/08 14:42:27| 0x8f9e458 lookup for 38 2007/11/08 14:42:27| 0x8f9e458 lookup for 9 2007/11/08 14:42:27| 0x8f9e458 lookup for 22 2007/11/08 14:42:27| httpProcessReplyHeader: Non-HTTP-compliant header: ' ' 2007/11/08 14:42:27| ctx: exit level 0 Any information/help/advice greatfully received. Thanks, Robin