The current link for the "Windows user? Follow these instructions instead" points to the Fedora 14 docs. A number of links in the old document are no longer functional and have been updated on the F18 side.
To confirm, the link should point to http://docs.fedoraproject.org/en-US/Fedora/18/html/Burning_ISO_images_to_disc/sect-Burning_ISO_images_to_disc-Validating_the_Files.html
patch file with change to F18 revision of iso burning guide patch.txt
Thank you :)
Patch applied with commit 0c93521, I just added some variables to have this link updated also for the next Fedora release versions.