Yeah, it's not possible to have some of those symbols, and sadly you are unable to change your username once it's made. Although, you may be able to PM the staff about changing the username .. Otherwise I'd suggest that they make a new account and ensure they are using proper symbols, the only symbol that for sure works is "~" so you can give that a try^^.. You may have to wait till registration starts .. Which could be quite the hassle. Any other problems?