The world is full of web servers that send *.iso and *.img as text/plain,
causing very irritating web browser behaviour when someone is unlucky enough to
click a link to one of those (eg. in fedora/linux/core/3/i386/os/images/).
Attached a fix for Fedora Core httpd's.
Created attachment 108257 [details]
*.img, *.iso -> application/octet-stream
fixed in 2.1.18-1, thanks!