I have Squid 2.7 authenticating against a Samba 3 PDC. All seems to work well and Squid defiantly is able to tell what username is browsing what site. My only problem is, every now and then, while browsing, it will work, then suddenly Firefox appearntly because of Squid, will ask for the username and password, then it all works well again, until the prompt randomly shows up again. Also, if you are browsing as a "limited" user, or just a proxy_auth user that has sites blocked, can you somehow temporarily login to Squid as another user, but then immediately when done, have it go back to the regular user. Almost like Window's RunAs function.
