I get:
[root@messerver root]# php -v
4.1.2
[root@messerver root]# rpm -qa | grep php
php-pgsql-4.1.2-2es3
php-mysql-4.1.2-7.3.6es1
php-ldap-4.1.2-7.3.6es1
e-smith-php-1.10.0-01
php-4.1.2-7.3.6es1
php-imap-4.1.2-7.3.6es1
[root@messerver root]#
So as you can see i do have php-pgsql, although i am not sure why. Should i try to uninstall it and see what moans?
I have other servers like this one, where I have used yum to update over the last few months, and have had no failures like this.