http://ubuntuforums.org/archive/index.php/t-9944.html http://wiki.debian.org/SecureAptI get this error quite a lot with http://cs.wisc.edu. Waiting, or doing apt-get update several times seems to straighten it out. I also, out of habit only use the mirrors on the official debian download list.
edwardsa@icantbelieveimdoingthis.com wrote;
Get:1 http://buckhill stable Release.gpg [378B] Ign http://buckhill testing Release.gpg
Michael