The reason why I published this link is because a coworker had a problem with viewing a PDF on IE6 when the cache was set to no-store over https.

The problem does not happen with Internet Explorer 7 or above or with FireFox, but the old IEs fail to retrieve the files when the cache directive is no-store or no-cache.

More of this on:

Internet Explorer file downloads over SSL do not work with the cache control headers

Unable to Open or Run Files if “Cache-Control: No Store” Header Set

and

Prevent caching when you download active documents over SSL

And another good reading on Caches on the web:

Caching Tutorial for Web Authors and Webmasters

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