Darned. Well, I didn't personally edit the index.php, but I'm guessing it somehow got edited? Because, I uploaded the original one... and now...

Warning: main(includes/templates/template_default/templates/tpl__default.php): failed to open stream: No such file or directory in /home/content/a/p/i/apinkpony/html/includes/templates/template_default/common/tpl_main_page.php on line 74

Warning: main(includes/templates/template_default/templates/tpl__default.php): failed to open stream: No such file or directory in /home/content/a/p/i/apinkpony/html/includes/templates/template_default/common/tpl_main_page.php on line 74

Fatal error: main(): Failed opening required 'includes/templates/template_default/templates/tpl__default.php' (include_path='.:/usr/local/lib/php') in /home/content/a/p/i/apinkpony/html/includes/templates/template_default/common/tpl_main_page.php on line 74
So from that I'm just going to take an educated guess that some of the template edits I did DID edit the index.php file, even though I haven't done any major modifications.