What are the disadvantages if we block vary header and pass to frontend Squid. www -> squid2 -> Squid1 -> clients squid2(vary header blocked, null cachedir,delay pool) squid1(storeurl,always direct all html) I no longer have issues(Bug#: 2678) on storeurl+vary for that setup, plus quick abort controllable by delay pool. But I'm wondering what would be the disadvantages when blocking vary header.