[gNewSense-users] MD5Sum Mismatch: big trouble or little?

[Theodore Ruegsegger]

What, exactly, does "MD5Sum mismatch" mean? Should I be worried that
the repository has been compromised?

I tried to install postgresql-8.1 and got this error message about
postgresql-common, on which it depends:

Failed to fetch
http://us.archive.gnewsense.org/gnewsense/pool/main/p/postgresql-common/postgresql-common_53ubuntu3gnewsense1_all.deb
 MD5Sum mismatch

E: Unable to fetch some archives, maybe run apt-get update or try with
--fix-missing?

Am I doing something wrong?

Ted