I'm hoping someone has seen this issue before -- after an upgrade from PHP 4 to PHP 5, I am receiving the error:

Warning Warning: I am able to write to the configuration file: /home/appalsho/public_html/store/includes/configure.php. This is a potential security risk - please set the right user permissions on this file (read-only, CHMOD 644 or 444 are typical). You may need to use your webhost control panel/file-manager to change the permissions effectively. Contact your webhost for assistance. See this FAQ

I have confirmed in my control panel that the permissions are 644. What else could be causing the error?

You can see it in action a http://appalshop.org/store/