That message may be telling you that you are missing the locale file for 
US, American English, UTF8 encoding.
in a terminal, type locale and then hit enter.
Here's what I get - you should get something similar:
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

More info is available by typing "man locale".


On 03/30/2015 06:55 PM, Michael Havens wrote:
> I got a good question: often when I am upgrading my system I get:
>
>      Warning: No support for locale: en_US.utf8
>
> My question is: isn't that our locale? I don't worry about it but what 
> exactly is that warning telling us?
> :-)~MIKE~(-:
>
>
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