Hi, I am hoping someone help me diagnose an 'Invalid Response' response I am receiving through SQUID 2.5STABLE10. The access.log logs the request with 'TCP_MISS/502', the users see... The following error was encountered: --- Invalid Response The HTTP Response message received from the contacted server could not be understood or was otherwise malformed. Please contact the site operator. Your cache administrator may be able to provide you with more details about the exact nature of the problem if needed. --- I have confirmed that 'relaxed_header_parser' is at its default setting of on. While investigating I telneted to the server in question and sent the request causing problems to see the servers response. The server responded with... HTTP/1.1 200 OK Server: Microsoft-IIS/5.0 Date: Wed, 01 Jun 2005 03:19:35 GMT Content-type: text/html set-cookie: F####=########################### <html> . . MANY LINES OF HTML . </html> I have '#'ed out private info. Is the case of the 'Set-Cookie' response what is causing the problem? I can't see anything else which could be the cause. Regards, Ken.