[CentOS] PHP Questions on move from CentOS 5.x to CentOS 6.x

Greetings,

A malfunctioning disk this past week accelerated a lingering decision to move to CentOS 6.x from CentOS 5.x.

Most of our content is functioning and being presented as it should be.

However, there appear to be php-related issues.

Basic squirrelmail (a php-dependent package) works correctly.

However, drupal, and other php-dependent parts that call postgresql and mysql databases of our site are not being presented.

Apache's log files show a 503 (for postgresql) and 500 (for mysql) errors

I'm troubleshooting this through obvious channels (looking at logfiles, searching google, sdiff'ing configuration files).

However, if someone has suggestions or answers, please do speak up!

Much thanks,

Max Pyziur pyz@brama.com