This error log looks somewhat intriguing... Did you happen to enter 'public_html' in your script path for your config file? Its unlikely that you have two 'public_html's in this message unless you have one public_html in your config file:
PHP Code:
Failed opening required '/public_html/public_html/inc/smarty/Smarty.class.php'
If this is the case, remove the 'public_html' from your script path entry in config.php, and the error should go away.