IDN : wrong punycode

Hi from France,

I'm using Virtualmin 4.04 GPL (with Webmin 1.660) and have an issue with IDN. When I create cléore.fr, Virtualmin generates xn--clore-dha5p.fr, instead of xn--clore-csa.fr.

The only way I've find to obtain the right punycode is by using virtualmin CLI and iconv :

[code]
domain=`echo cléore.fr | iconv --from-code=UTF-8 --to-code=ISO-8859-1`
virtualmin create-domain --domain $domain --alias masterdomain.tld --features-from-plan;
[/code]

I wrote a tiny perl script which use IDNA::Punycode library from /usr/share/webmin/virtual-server, and the result is wrong too :
[code]
#!/usr/bin/perl
#

use strict;
use warnings;
use IDNA::Punycode;

my $str = 'cléore.fr';
print "$str => ". encode_punycode($str);
[/code]

Output: cléore.fr => xn--clore.fr-vka3x

I run Debian 7 with fr_FR.UTF-8 encoding, and webmin is configure with lang=french.UTF-8.

Am I doing something wrong or is it a bug?