Problem upgrading from 8.0.1 to 8.0.3

I was running 8.0.1 and PHP in FC3 with no problems.

Then i upgraded to 8.0.3 using yum and yum installed
postgresql-libs.i386 0:7.4.8-1.FC3.1. (Is it Ok?)

Now i am receving this message from PHP:
PHP Fatal error: Call to undefined function: pg_pconnect()

php-pgsql was already installed. I removed it and tried to reinstall
and got this dependencies errors:

# yum install php-pgsql*
Setting up Install Process
Setting up Repos
base 100% |=========================| 1.1 kB 00:00
updates-released 100% |=========================| 951 B 00:00
Reading repository metadata in from local files
base : ################################################## 2622/2622
updates-re: ################################################## 1041/1041
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Package php-pgsql.i386 0:4.3.11-2.6 set to be updated
--> Running transaction check
--> Processing Dependency: libpq.so.3 for package: php-pgsql
--> Restarting Dependency Resolution with new changes.
--> Populating transaction set with selected packages. Please wait.
---> Package postgresql-libs.i386 0:7.4.8-1.FC3.1 set to be updated
--> Running transaction check
--> Processing Dependency: libpq.so.4 for package: postgresql-python
--> Processing Dependency: libpq.so.4 for package: postgresql-contrib
--> Processing Dependency: postgresql-libs = 8.0.3 for package:
postgresql-devel--> Processing Dependency: libpq.so.4 for package:
postgresql-server
--> Processing Dependency: libpq.so.4 for package: postgresql
--> Finished Dependency Resolution
Error: Missing Dependency: libpq.so.4 is needed by package postgresql-python
Error: Missing Dependency: libpq.so.4 is needed by package postgresql-contrib
Error: Missing Dependency: postgresql-libs = 8.0.3 is needed by
package postgresql-devel
Error: Missing Dependency: libpq.so.4 is needed by package postgresql-server
Error: Missing Dependency: libpq.so.4 is needed by package postgresql

Regards, Clodoaldo Pinto