users file case sensitive

Hi, Background: FreeRadius Version: 2.1.1-7.10.1 Users are stored in LDAP, I am using the users file to assign static IP Addresses to certain users. It seems that the users file is case sensitive, I found a few articles on the net regarding this, but none really supplied a definitive answer. Is there a way to prevent the users file from being case sensitive ? If not, what is the recommended method to elegantly avoid this problem. Regards Gregg