In article <1105352741.888401.61730@c13g2000cwb.googlegroups. com>,
"thufir.hawat@mail.com" <thufir.hawat@mail.com> wrote:

>The md5sum checks out ok for FC3-i386-disc1.iso, on the hard drive,
>using <http://www.md5summer.org/>. as I haven't found a way to test
>the actual burned cd...

What I do is mount it and do a diff -r against the original files. In
your case the originals are on a CD image, but you can mount that via
loopback.