content type header for downloading files

I have the following headers in download.php which forces a download dialog box to be opened when a user clicks on a desired file: header("Content-type: application/octet"); header("Content-Length: $filelength"); header("Content-Disposition: attachment; filename=".basename($fname).";"); This works fine with IE, but Mozilla adds a '.php' extension to the filename if i choose the save option, and asks me to choose which application to use if I want to open the file. The files are binary. Do I need to change the content-type header? If so, to what? If not, what do I do? Thanks, Dara -- For the largest free email in Ireland (25MB) & File Storage space (20MB), visit http://www.campus.ie Powered by Outblaze