CentOS has moved the postgresql-8.1.4 RPMS for i386 and x86_64 into the CentOSPlus repository.

(do not forget the compat-postgresql rpm as well)

Please backup your postgresql-7.x databases prior to upgrading per this link:

http://www.postgresql.org/docs/8.1/interactive/install-upgrading.html

(backup data, install RPMS, /etc/init.d/postgresql restart, restore data)

Thanks, Johnny Hughes