IE : Unable to download * from *. Unable to open this Internet site. The requested site is either unavailable or cannot be found

Question

I have an issue with my website and IE. I have a file Document.ashx that becomes a document from my database depending on the parameter passed in the query

Answer 1

Based on the KB article David offered here (Internet Explorer file downloads over SSL do not work with the cache control headers), we changed our outgoing headers away from Cache-Control: no-cache to Cache-Control: private. This seems to have resolved the IE8 problem without affecting other browsers. Beware of using Cache-Control: no-store as well.