Invalid characters in file name

[Elbarbudo]

Step 1 :

I got file names with invalid encoding (mainly from an Ooooold Mac)
In nautilus, it is displayed as

Ch 03 _ jud�o-christianisme.DOC (codage non valide)

But an ls command displays :

Ch 03 _ jud?o-christianisme.DOC
(Without the "codage non valide" mention)

Step 2 :

In Nautilus, I renamed the file just by correcting the invalid character :

The result is :
Ch 03 _ judéo-christianisme.DOC (codage non valide)

And the ls command issues :
Ch 03 _ judéo-christianisme.DOC (codage non valide)

So I had originally an invalid file without any mention of it in command line, and I end with a correctly encoded filename with the mention "codage non valide"

I wish a more consistent behaviour by not writing back the string " (codage non valide)" to the file name after correction,
or by writing the string " (codage non valide)" to the file name on detection of the invalid coding.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nautilus 1:3.10.1-0ubuntu9.10
ProcVersionSignature: Ubuntu 3.13.0-68.111-generic 3.13.11-ckt27
Uname: Linux 3.13.0-68-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Nov 15 08:09:53 2015
GsettingsChanges:
 b'org.gnome.nautilus.list-view' b'default-visible-columns' b"['name', 'size', 'type', 'date_modified', 'owner', 'group', 'permissions']"
 b'org.gnome.nautilus.list-view' b'use-tree-view' b'true'
 b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'date_accessed', 'owner', 'group', 'permissions', 'mime_type', 'where']"
InstallationDate: Installed on 2014-05-24 (539 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)