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From howard chen <>
Subject [users@httpd] IE failed to cache images on subdomain if Vary header is sent
Date Sun, 19 Apr 2009 10:48:52 GMT

Since I am using mod_deflate to compress resources (js, html)

But it also give me Vary: Host for images resources, this is okay.

But I found that now if the images is served from subdomain, it will
not be cached by IE7 (by looking at the Temporary Internet Files

Now I have no method but to unset the vary , e.g.

Header unset Vary

Then caching is back for IE7.

Any better or correct method?


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