Reg Key is case sensitive during registraton

I have a registration key defined as "MANOR" for a particular group. When attempting to register for a new account using a registration key, I type "manor" and am presenting with the following error: "Not a valid group registration key." Registration is only successful if I use all caps.

After looking at the module code, I'm a bit confused.

function og_reg_codes_valid_code($code) {
  $code = strtoupper(trim($code)); 

It looks like the validation function makes the user input uppercase before checking it against the value in the database.

Why would this happen? Is this intended? Am I missing something here?

Thanks!