I did this couple of tries : url : http://personal.psu.edu/tao5048/JPG.jpg log MISS then TCP_REFRESH_UNMODIFIED/304 383 GET http://personal.psu.edu/tao5048/JPG.jpg and : TCP_HIT/200 211655 GET http://personal.psu.edu/tao5048/JPG.jpg and redbot : TCP_HIT/200 91586 GET http://redbot.org/?uri=http%3A%2F%2Fpersonal.psu.edu%2Ftao5048%2FJPG.jpg on the other hand ... using : http://i1.ytimg.com/vi/pMr5W4bCP8s/mqdefault.jpg log : TCP_MISS/200 14168 GET http://i1.ytimg.com/vi/pMr5W4bCP8s/mqdefault.jpg and no matter how many times I open it or refresh that same picture it stays a MISS . redbot : TCP_MISS/200 22998 GET http://redbot.org/?uri=http%3A%2F%2Fi1.ytimg.com%2Fvi%2FpMr5W4bCP8s%2Fmqdefault.jpg and right after that : TCP_HIT/200 22984 GET http://redbot.org/?uri=http%3A%2F%2Fi1.ytimg.com%2Fvi%2FpMr5W4bCP8s%2Fmqdefault.jpg -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Help-Squid-3-4-0-2-ytimg-tp4662579p4662607.html Sent from the Squid - Users mailing list archive at Nabble.com.