I downloaded the latest 7.4.2 postgreSQL rpms for RH9 from www.postgresql.org rpm --checksig confirms that signatures/MD5 of all the packages are ok. On being copied onto my local yum repository and running yum-arch -c , they all fail the test. What is happening? Do I have to get some gpg public key of postgresql people and add it somewhere? If so, how? What exactly is yum-arch doing with -c...is it only checking for RH sigs? Sanjay.