I have users on my system using several different locales. When i upgraded to redhat-6.1 some of them reported that they could no longer set locale with LANG or LC_* as they used to. After looking around a bit i noticed that the LC_ALL variable is set in /etc/sysconfig/i18n which overrides all the other settings. I would say this is counter-intuitive to the user to need to unset LC_ALL to make their old .bash_profiles work. I would like to see that only LANG (the default lang that can be overridden by LC_*) was set in /etc/syconfig/i18n
This will be fixed in the next installer release; it will not write a 'LC_ALL' value to /etc/sysconfig/i18n.