Hi...

I just ran across an odd issue. Our ASP.Net app was returning a zip file.
We're using the Blowery compression module, and that ended up applying
deflate compression to the zip. Now, this made the file bigger rather than
smaller, but the interesting quirk was that IE 7 took all the bytes, didn't
bother to un-deflate them, and saved them to disk. This resulted in a
corrupt file. Firefox did the right thing.

Here are the output headers generated by the request

Content-disposition: inline; filename=foo.zip
Content-Encoding: deflate
X-Compressed-By: HttpCompress
Last-Modified: Thu, 12 Jun 2008 19:33:43 GMT
Vary: Accept-Encoding
Content-Type: application/x-zip-compressed
Content-Length: 201133

The actual size of the file is 131370, which is the size of the file Firefox
saves. The file IE saves is the full 201133.

Why would IE ignore the Content-Encoding: header?

Thanks
Mark