We have a site that we have built in WordPress that is having some issues. When you land on the home page of the site there are certain include files that do not load upon first landing on the page and it also happens intermittently throughout viewing this page. I would like to know it there is a good way to debug these includes (no errors in PHP log) or what best practice would be to trace down this issue. I am at a loss.
I know WP hooks are recommended over includes but this theme was passed off to us using hooks.
Note: Firebug Console does not provide any errors.
Any and all advice is greatly appreciated, I am lost with this one.