Hi Mike,
yes, we tested the registry hack and it seems to work but is not very elegant at all as it needs certain rights and is a clientside solution.
Alfresco (v 3300) sets the following headers in https mode (checked by live http headers firefox plugin):
HTTP/1.1 200 OK
Server: Apache-Coyote/1.1
Pragma: No-cache
Cache-Control: must-revalidate
Expires: Thu, 01 Jan 1970 00:00:00 UTC
Set-Cookie: alfUser=admin; Expires=Sun, 13-Jun-2010 21:22:53 GMT; Path=/alfresco
Last-Modified: Mon, 17 May 2010 09:59:22 GMT
Etag: "1274090362239"
Accept-Ranges: bytes
Content-Range: bytes 0-182765/182766
Content-Type: application/pdf;charset=utf-8
Content-Length: 182766
Date: Sun, 06 Jun 2010 21:22:53 GMT
tried using the download-file functionality.
Best regards,
Rolf