Did you see
http://lists.over.net/pipermail/mod_gzip/2002-December/006826.html?
Sylvain Wallez wrote:
Hi all,
I found an annoying thing today. The following straightforward sitemap
statement, which is intended to download a zip file, leads IE to
display an error message when the users tries to open Winzip from IE
(saving the file on disk is ok):
<map:read src="foo.zip" mime-type="application/x-zip-compressed"/>
After some protocol-level debugging, it appears to be caused by the
"Vary: Host" header that is added by the ResourceReader, which leads
to an error message in IE. This bug has been identified in 1999 [1]!!!
Now it seems that this header was added to work around an IE cache bug
[2] about which no details are given.
So the fix to the unknown cache problem leads to falling into another
IE bug. Can someone explain the reason for the Vary header? If not,
I'd like to remove it so that downloads work again...
Sylvain
[1] http://archive.apache.org/gnats/4118
[2] http://issues.apache.org/bugzilla/show_bug.cgi?id=14048
