First I want to say, this is an amazing script, congratulations to developers.
Can I make some suggestions?
I’m sorry, my English is very bad, but I’ll try to explain…
I’m talking about undefined variables, if the user have “error_reporting†configured to “E_ALLâ€, the Php will show a lot of notices, because the undefined variables in all code, and if the user are using a server that don’t gives any access permission to Php.ini file, he don't will be able to change the PHP configuration to hide notices and it makes impossible to still use the script, because the notices fills all the screen.