I'm helping my cousin with her WP blog. She installed v. 3.3.2 a while back, but new we are prompted to upgrade to 3.4.1. When we attempt this, we experience a fatal error:
Fatal error: require_once() [function.require]: Failed opening required '/home/johns615/public_html/wp-admin/custom-background.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/johns615/public_html/wp-includes/theme.php on line 1372
Advice on how to upgrade without throwing this error would be greatly appreciated.