Using the current version of Firefox on FC4-development, I'm unable to save some files to disk. Here's an example: http://www.senseabilities.com.au/education Neither of the PDFs on this page can be saved to disk or opened in an application (the OK button is greyed out) The PDF's were created using OOo2, and the downloads are being handled using a CGI script that check the authenticity of the downloader before offering the file for download. All of this works fine on earlier versions of Firefox as far as I'm aware. Oh, and I'm using firefox-1.0-8 Rodd