Confirming what nelsoc said, my password is upper/lower case, numeric, etc. Now if you're referring to "alternative" characters, such as ALT-### on a PC, then maybe they are not allowed, but shifted characters (i.e. A vs a, S vs s) are definitely allowed.

I have run into some sites that don't allow the password complexity that I've come to expect for security (punctuation, uppercase, special characters). WCG doesn't appear to be one of those.