Step to reproduce :
- select the french bepo keyboard in the list of layouts
- open nautilus
- select the list view (not the icon view) 
- create a folder
- when it asks a name for the folder, try to give a name containing an underscore (AltGr+space on the bépo layout)
- as soon as you press the AltGr key the focus is lost and the name of the folder stays «Untitled Folder»

Remarks :
- I am using a qwerty keyboard with the french bépo layout
- There is no problem for entering underscore when I am renaming the previously created «Untitled Folder»
- It only happens in list mode. In icon mode it works fine.

Additional information : 
- When the qwerty layout is selected the AltGr key is recognize as a "Alt R" key;
- When the bépo layout is selected the AltGr key is recognize as a "Level 3 shift" key.

Please find more information regarding this behaviour here https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1248888


Ubuntu apport follolws :
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: nautilus 1:3.6.3-0ubuntu16
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic i686
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: i386
Date: Thu Nov 7 14:59:56 2013
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/nautilus
GsettingsChanges:
 b'org.gnome.nautilus.window-state' b'geometry' b"'1315x714+49+24'"
 b'org.gnome.nautilus.window-state' b'sidebar-width' b'153'
InstallationDate: Installed on 2013-06-10 (149 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)