ispCP Omega 1.0.6 fails after upgrading PHP to 5.3.3 from 5.3.2

[edeis]

Wierdest thing.

I've been running ispCP for months. Just upgraded PHP from 5.3.2 to 5.3.3. When loading ispCP, all I get is a blank page! PHP upgrade works on all other websites on the server, phpmyadmin, roundcube, wordpress, etc.

Really puzzled. Can you help me quick? I need to get ispCP back up so users can administer their websites!!

I've double checked that error reporting is on.
/var/www/fcgi/master/php5/php.ini
error_reporting = E_ALL & ~E_NOTICE
display_errors = On

ispcp-lib.php
error_reporting(E_ALL);

I've even added this to /var/www/ispcp/gui/index.php
error_reporting(E_ALL ^ E_DEPRECATED);
echo ("Test");

With this change, when accessing index.php, it will output "Test" on a blank page but ispCP does not show up!!
I've put another echo after
require 'include/ispcp-lib.php';
in /var/www/ispcp/gui/index.php

and it does not show. Sounds like the problem lays with ispcp-lib.php

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Testing...looks like ispcp-lib.php stops when it gets to:
require_once(INCLUDEPATH . '/ispcp-db-keys.php');

I am going to check this file and see where it stops.

---

Okay, here's an update.

The problem was here:
require_once(INCLUDEPATH . '/ispcp-db-keys.php');

It died at this point. Would not even display any echo commands from this file.

I noticed that it had different file permissions than all the other files (the group was not readable, only owner). chmod g+r, and bam! it works.