/etc/passwd.rpmnew
/etc/group.rpmnew
/etc/modprobe.conf
...

Be sure to remove these files type of .rpmnew files before continuing.

You can find your waiting .rpmnew files:

updatedb
locate rpmnew

Now you should be left will a lot of files, so just to be sure, do a diff of them all, just in case you forgot something.

updatedb
locate rpmnew | while read line; do diff $line ${line%.rpmnew}; done | less

(07/24/2007 update, thanks John :)

locate rpmnew | while read line; do diff -ruN ${line%.rpmnew} $line; done | less

Once you have carefully evaluated the output of the above and either merged the files or decided the new file is a good thing.

WARNING! This next step could disable your computer and make it so you can't restart or log back in!  Be sure you know what your doing.

To move the remaining files over the current files:

updatedb
locate rpmnew | while read line; do mv -f $line ${line%.rpmnew}; done

This all seemed to work on my CentOS 5.0 and 4.0 systems.

/pgsql/data(/.*)?     system_u:object_r:postgresql_db_t:s0
/pgsql        system_u:object_r:postgresql_db_t:s0
/pgsql/pgstartup\.log system_u:object_r:postgresql_log_t:s0

/sbin/fixfiles check /pgsql
/sbin/fixfiles restore /pgsql

Finally updated  /etc/init.d/postgresql

PGDATA=/pgsql/data
PGLOG=/pgsql/pgstartup.log

Most likely I will decide that not mounting on /var/lib/pgsql is a bad idea, but I would like to be able to start parallel servers that point to snapshots at some time in the future.