i have an ubuntu 8.04 mirror and a debian-etch mirror setup.

the debian one works fine for doing local net-installs. however my ubuntu one has never worked. i have a week old burn of the latest iso, but it says i have an invalid release file.

i've googled around and can't seem to find a definitive solution to solving this. the mirror works fine for performing updates, it simply won't do installs.

any help would be appreciated.