Problem with using UTF-8 for FAT?

[Frans Pop <elendil@planet.nl>]

When using an USB-stick or SD card during installation I'm seeing the 
following error/warning in the syslog:
   kernel: FAT: utf8 is not a recommended IO charset for FAT filesystems,
   filesystem will be case sensitive!

Cause is obviously the changed default charset in the kernel some time 
ago. We responded to that by adding the utf8 NLS module in D-I instead of 
the iso8859-1 module.

Question is: do we need to do anything about this?

If we do I guess the solution would be to add the iso8859-1 module back in 
and explicitly specify the encoding to use wherever we mount FAT (with as 
added problem that we often mount "auto" instead of a specific file 
system).

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