Mozilla MD5SUM mismatch for orig.tar.gz on Debian mirror - ftp.au.debian.org

[Zenaan Harkness <zen@freedbms.net>]

I've been getting this for like a week or so (may be more), and so my
apt-move mirror never gets properly updated. Is this a security problem?
Any ideas what I should do next - eg. report it somewhere (other than
here:) ??

Failed to fetch
http://ftp.au.debian.org/debian/pool/main/m/mozilla-firefox/mozilla-firefox_0.9.1.orig.tar.gz  MD5Sum mismatch
Failed to fetch
http://ftp.au.debian.org/debian/pool/main/m/mozilla-firefox/mozilla-firefox_0.9.1-6.diff.gz  0 Partial Content [IP: 203.16.234.19 80]

tia
zen