IE 7 & 8 both throw an error when users attempt to download a csv file over https.
Internet Explorer cannot download downloadPage.jsf. Internet Explor
Here's what I've done in my PHP code:
header( "HTTP/1.0 200 OK" );
header( "Content-Disposition: inline; filename=$path" );
header( "Content-Type: attachment; application/pdf" );
header( "Content-Length: $info[7]" );
header( "Cache-Control: no-store, no-cache" ); // IE 8 requires these two lines, exactly like this
header( "Pragma: private" ); // IE 8 requires these two lines, exactly like this
readfile( $tmpfile );