Hi, I have upgraded our squid from 2.5 stable6 to 3.1.0.14 . This because many remote web servers want Microsoft connection oriented authentication and I 'have seen that squid 2.5 doesn't forward that kind of authentication. . Now using squid 3.1, my users can connect such web servers but there is still an issue.. >From time to time , when uploading a file , users get a blank page and message "Request not yet fully sent" can be seen in cache.log file. Sniffing this (sniffer between proxy and web servers) I can see that, from time to time, servers are going on sending authentication requests although the user has been already authenticated (is it a normal behaviour ?). So sometimes it happens that Squid receives an authentication request as it is still sending upload data to the server. This stops the upload and produces the message seen in cache.log Thank you for help . Best Regards, Jean-Marc Nogues jmnogues@xxxxxxxxxxx